Asian Journal Of Sports Medicine[JOURNAL]
Sun
200 papers
Lack of Association Between ACE Indel Polymorphism and Cardiorespiratory Fitness in Physically Active and Sedentary Young Women.
Verlengia R, Rebelo AC, Crisp AH … +5 more , Kunz VC, Dos Santos Carneiro Cordeiro MA, Hirata MH, Crespo Hirata RD, Silva E
Asian J Sports Med · 2014 Sep · PMID 25520764 · Full text
BACKGROUND: Polymorphisms at the angiotensin-converting enzyme gene (ACE), such as the indel [rs1799752] variant in intron 16, have been shown to be associated with aerobic performance of athletes and non-athletes. Howev...
BACKGROUND: Polymorphisms at the angiotensin-converting enzyme gene (ACE), such as the indel [rs1799752] variant in intron 16, have been shown to be associated with aerobic performance of athletes and non-athletes. However, the relationship between ACE indel polymorphism and cardiorespiratory fitness has not been always demonstrated. OBJECTIVES: The relationship between ACE indel polymorphism and cardiorespiratory fitness was investigated in a sample of young Caucasian Brazilian women. PATIENTS AND METHODS: This study investigated 117 healthy women (aged 18 to 30 years) who were grouped as physically active (n = 59) or sedentary (n = 58). All subjects performed an incremental exercise test (ramp protocol) on a cycle-ergometer with 20-25 W/min increments. Blood samples were obtained for DNA extraction and to analyze metabolic and hormonal profiles. ACE indel polymorphism was determined by polymerase chain reaction (PCR) and fragment size analysis. RESULTS: The physically active group had higher values of peak oxygen uptake (VO2 peak), carbon dioxide output (VCO2), ventilation (VE) and power output than the sedentary group (P < 0.05) at the peak of the exercise test. However, heart rate (HR), systolic blood pressure (SBP) and diastolic blood pressure (DBP) did not differ between groups. There was no relationship between ACE indel polymorphism and cardiorespiratory variables during the test in both the physically active and sedentary groups, even when the dominant (DD vs. D1 + 2) and recessive (2 vs. DI + DD) models of inheritance were tested. CONCLUSIONS: These results do not support the concept that the genetic variation at the ACE locus contributes to the cardiorespiratory responses at the peak of exercise test in physically active or sedentary healthy women. This indicates that other factors might mediate these responses, including the physical training level of the women.
The influence of different modes of ventilation on standing balance of athletes.
Malakhov M, Makarenkova E, Melnikov A
Asian J Sports Med · 2014 Sep · PMID 25520763 · Full text
BACKGROUND: The respiratory movements are one of the factors influencing standing balance. Although well-trained athletes have better postural performance compared to untrained men, it's not quite clear, if the formers'...
BACKGROUND: The respiratory movements are one of the factors influencing standing balance. Although well-trained athletes have better postural performance compared to untrained men, it's not quite clear, if the formers' upright posture would be more stable during different ventilation modes, maximal voluntary hyperventilation and inspiratory breath-holding. There are no studies on this subject in the available literature. OBJECTIVES: The aim of this study was to investigate an influence of maximal inspiratory breath-holding and maximal voluntary hyperventilation on the standing balance of athletes. PATIENTS AND METHODS: We assessed the amplitude and the velocity of postural sway in the athletes (n = 38) and untrained subjects (n = 28) by the force platform. The frequency characteristics of the center of pressure (CP) oscillations' were also analyzed. The amplitude and the frequency of respiratory movements were estimated by the strain gauge. RESULTS: It was found that during quiet breath velocity and frequency of CP oscillations were lower in the athletes. Breath holding led to an increase of velocity and frequency of CP displacement in both groups, increase of these indices was more pronounced in the athletes. Maximal voluntary hyperventilation caused a significant increase of all stabilographic indices in both groups. Increase of frequency and amplitude of respiratory movements were mainly observed during hyperventilation in athletes and it caused an increase of the velocity of CP displacement. Changes of sway amplitude were the same in both groups. CONCLUSIONS: Breath holding led to activation of the postural control, which was more pronounced in the athletes. Hyperventilation caused an impairment of the postural stability. The athletes' postural system compensated the impact of hyperventilation more efficiently versus controls, but it was achieved at the expense of greater effort.
A study of sports related occurrence of traumatic orodental injuries and associated risk factors in high school students in north India.
Singh G, Garg S, Damle SG … +3 more , Dhindsa A, Kaur A, Singla S
Asian J Sports Med · 2014 Sep · PMID 25520762 · Full text
BACKGROUND: Oral and dental injuries contribute to a major part of sports related injuries in children. Trauma occurring in developing years disrupts normal social functioning and brings about a major impact on quality o...
BACKGROUND: Oral and dental injuries contribute to a major part of sports related injuries in children. Trauma occurring in developing years disrupts normal social functioning and brings about a major impact on quality of life due to their cumulative effect. OBJECTIVES: To assess the prevalence and causes of various sports related traumatic orodental injuries among 8 to 16 year school students along with identifying the associated risk factors in North India. PATIENTS AND METHODS: A cross sectional study consisting of high school students of different organized sports teams aged 8-16 years was carried out in geographical area of north India. The students were selected by multistage cluster sampling methodology. 1105 students from 19 school teams (sports teams) and sports academies participated in study through structured interview and clinical examination in different sports situations. RESULTS: 30.3% (n = 335) of students suffered from orodental injuries. A higher number of girls had injury (32%) than boys (29%), though the difference was not significant. Most of the students suffered from soft tissue injuries (48%) followed by tooth fractures (43%). Maximum numbers of injuries were reported in high velocity (44.1%) and medium intensity sports (46.6%) (P < 0.001) Maximum injuries occurred in basketball (50%) and lowest in the field of badminton (6.1%) (P < 0.05). Amateurs (52%) suffered the most from injuries as per level of coaching. Only 6% of boys and 2% of girls used mouthguards. CONCLUSIONS: The result of the present study confirmed that students participating in different organized sports at high school level are at a very high risk of getting orodental injury. Hence knowledge and education regarding prevention of traumatic injuries is of paramount importance.
Benign paroxysmal positional vertigo caused by swimming.
Selcuk OT, Eraslan A, Osma U … +3 more , Eren E, Eyigor H, Yilmaz MD
Asian J Sports Med · 2014 Mar · PMID 24868435 · Full text
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Exercise therapy for total tear of rotator cuff: a case report.
Nejati P, Akbari F
Asian J Sports Med · 2014 Mar · PMID 24868434 · Full text
BACKGROUND: Shoulder pain is one of the most common problems in ages older than 60 years of age. Rotator cuff pathology is the most common etiology of shoulder pain. Most of rotator cuff pathologies are treated conservat...
BACKGROUND: Shoulder pain is one of the most common problems in ages older than 60 years of age. Rotator cuff pathology is the most common etiology of shoulder pain. Most of rotator cuff pathologies are treated conservatively in old ages and exercise therapy is not an accepted intervention for management of rotator cuff tear yet. CASE PRESENTATION: The case was a man of 53 years age with shoulder pain who had total tear of supraspinatus tendon and biceps tendinitis in the right shoulder. He had regularly gone swimming, mountain climbing and running in the last 10 years. The case was managed by exercise therapy for 3 months and physical modalities for 20 sessions. Shoulder pain and his function and right shoulder range of motion increased after 3 months. Para clinical findings did not change after treatment, though. The improvements continued 15 months after the beginning of the treatment. CONCLUSION: Exercise therapy was very effective for improving pain and function in total tear of supraspinatus tendon and tendinitis of biceps.
Repeated Acceleration Ability (RAA): A New Concept with Reference to Top-Level Field and Assistant Soccer Referees.
Barberó-Álvarez JC, Boullosa D, Nakamura FY … +2 more , Andrín G, Weston M
Asian J Sports Med · 2014 Mar · PMID 24868433
PURPOSE: To perform an exploratory characterization of repeated sprint sequences (RSS) and repeated acceleration sequences (RAS) in top level soccer referees. METHODS: 7 field and 7 assistant referees were monitored duri...
PURPOSE: To perform an exploratory characterization of repeated sprint sequences (RSS) and repeated acceleration sequences (RAS) in top level soccer referees. METHODS: 7 field and 7 assistant referees were monitored during 2007 America's Soccer Cup with GPS technology. Sprints of >18 km·h(-1) and accelerations of >1.5 m·s(-2) were considered as high intensity activities. RSS and RAS were defined as a minimum of 3 consecutive bouts interspersed with a maximum of 45 s. RESULTS: Field and assistant referees performed substantially more accelerations than sprints. Neither field nor assistant referees recorded any RSS. In contrast, total distance performing RAS amounted to ∼37% and ∼20% of the total distance covered by accelerations during the entire match for field and assistant referees, respectively. Only field referees exhibited fatigue-related reductions in RAS characteristics between halves. CONCLUSION: The results of the present study would appear to support the appropriateness of a repeated acceleration ability (RAA) concept, instead of the repeated sprint ability (RSA) concept, in soccer referees. Further studies should assess RAS in referees and athletes of different team sports for designing better training exercises and physiological testing.
Surface Electromyography Assessments of the Vastus medialis and Rectus femoris Muscles and Creatine Kinase after Eccentric Contraction Following Glutamine Supplementation.
Rahmani-Nia F, Farzaneh E, Damirchi A … +2 more , Majlan AS, Tadibi V
Asian J Sports Med · 2014 Mar · PMID 24868432 · Full text
PURPOSE: L-glutamine is the most abundant amino acid found in human muscle and plays an important role in protein synthesis and can reduce the levels of inflammation biomarkers and creatine kinase (CK) after training ses...
PURPOSE: L-glutamine is the most abundant amino acid found in human muscle and plays an important role in protein synthesis and can reduce the levels of inflammation biomarkers and creatine kinase (CK) after training sessions. Delayed onset muscle soreness (DOMS) develops after intense exercise and is associated with an inflammatory response. The purpose of this study was to investigate the effect of glutamine supplementation on surface electromyography activity of the vastus medialis muscle (VMM) and rectus femoris muscle (RFM) and levels of creatine kinase after an eccentric contraction. METHODS: SEVENTEEN HEALTHY MEN (AGE: 22.35±2.27yr; body mass: 69.91± 9.78kg; height: 177.08±4.32cm) were randomly assigned to experimental (n=9) and control groups (n=8) in a double-blind manner. In both groups, subjects were given L-glutamine supplementation (0.1g.kg(-1)) or placebo three times a week for 4 weeks. Median frequency (MDF) and mean power frequency (MPF) for VMM and RFM muscles and also CK measurements were performed before, 24h and 48 h after a resistance training session. The resistance training included 6 sets of eccentric leg extensions to exhaustion with 75% of 1RM. RESULTS: There was no significant difference between groups for MDF or MPF in VMM and RFM. The difference of CK level between the groups was also not significant. CONCLUSION: The results of this study indicate that glutamine supplementation has no positive effect on muscle injury markers after a resistance training session.
Physical Activity during a Prolonged Congested Period in a Top-Class European Football Team.
Djaoui L, Wong del P, Pialoux V … +4 more , Hautier C, Da Silva CD, Chamari K, Dellal A
Asian J Sports Med · 2014 Mar · PMID 24868431 · Full text
PURPOSE: The aim of the present study was to examine the variation in physical activity of elite soccer players within successive prolonged periods of fixture congestion over 5 months of competition during the competitiv...
PURPOSE: The aim of the present study was to examine the variation in physical activity of elite soccer players within successive prolonged periods of fixture congestion over 5 months of competition during the competitive season 2011-2012. METHODS: Sixteen international players, classified into 6 positions (central defenders: CD; full-backs: FB; central defensive midfielders: CDM; wide midfielders: WM; central attacking midfielders: CAM; forwards: FW), were examined during the French First League, French Cup, and UEFA Champion's League matches. The total distance covered at light (<12 km.h(-1)), sustained-cruising (>18-21 km.h(-1)), high (>21-23 km.h(-1)), very high (>23-25 km.h(-1)), sub-maximal (>25-27 km.h(-1)), and maximal (>27 km.h(-1)) intensity running (IR) were measured and analysed using a semi-automatic match analysis system (Amisco Pro™). RESULTS: No differences were observed between congested and non-congested periods (two vs. one match a week, respectively) for the total distance covered at all the speed thresholds over 18 km.h(-1), with no variation in physical fitness over the 5 studied months. Specifically to the playing positions, regardless of the congestion periods, FB and WM covered more distance than CDM over 21km.h(-1); FB, WM and FW covered similar distances for all running intensities; and CD and CDM covered shorter distance during non-congested compared to congested periods (P<0.05) at light-IR. CONCLUSION: The present study reveals that prolonged congested match fixture did not affect the high-intensity physical activity of top-class soccer players during official games during a 5 months fixture period.
Association of ambient air quality with pulmonary function of youngster footballers.
Das P, Chatterjee P
Asian J Sports Med · 2014 Mar · PMID 24868430
PURPOSE: Air pollution has remained a major health concern in Kolkata. The present study was carried out to analyze the association between the levels of air pollutants and pulmonary function of youngster footballers liv...
PURPOSE: Air pollution has remained a major health concern in Kolkata. The present study was carried out to analyze the association between the levels of air pollutants and pulmonary function of youngster footballers living in two different air pollutant zones of Kolkata, West Bengal. METHODS: Air pollution data of the two ambient air quality-monitoring stations located at Rabindrabharati and Victoria Memorial was collected for the period from January 2012 to March 2012. Study was conducted on two hundred and twenty boys of the age range 14-16 years living within 3km radius of the two monitoring stations. Sample consisted of 60 footballers (30 from Rabindrabharati and 30 from Victoria Memorial) and 160 sedentary boys (80 from Rabindrabharati and 80 from Victoria Memorial). They were investigated for their spirometric lung functions by the method and technique recommended by American Thoracic Society. Results were expressed as mean ± SD and independent samples T test was conducted to compare between two groups. RESULTS: Results revealed that particulate matter (PM10), oxides of sulfur (SO2) concentrations were significantly higher in Rabindrabharati zone, whereas no significant differences were noted in oxides of nitrogen (NO2) and carbon monoxide (CO) concentrations though values were higher at Rabindrabharati than Victoria Memorial. Forced vital capacity (FVC), forced expiratory volume in 1 second (FEV1), forced mid expiratory flow (FEF25-75%), maximum voluntary ventilation (MVV) were significantly lower both in footballers (P<0.05) and sedentary boys (P<0.01) of Rabindrabharati zone. CONCLUSION: Exposure to high air pollutant concentration might be associated with reduced pulmonary function in both sedentary and trained boys in spite of the fact that regular participation in training program may improve pulmonary function.
Neuromuscular and metabolic responses to three different resistance exercise methods.
Arazi H, Mirzaei B, Heidari N
Asian J Sports Med · 2014 Mar · PMID 24868429 · Full text
PURPOSE: The aim of this study was to compare the effect of resistance exercise with three different methods on integrated electromyography (IEMG) and metabolic responses in recreational athletes. METHODS: Twenty four ma...
PURPOSE: The aim of this study was to compare the effect of resistance exercise with three different methods on integrated electromyography (IEMG) and metabolic responses in recreational athletes. METHODS: Twenty four males (mean 23.59±0.87 years) were randomly assigned to three experimental groups. Participants performed knee extension exercises: Slow (SL: 3-3, 3s for each concentric and eccentric action with 50% of 1 RM), Normal (NH: 1-1, 1 s for each concentric and eccentric action 80% of 1 RM) and Traditional (TH: 2-4, 2s for concentric and 4s for eccentric action with 80% of 1 RM). Plasma lactate, glucose and triglyceride concentration and IEMG was measured before and immediately after performing four sets of resistance exercise. RESULTS: Each method significantly decreased IEMG (P<0.05), but there was no significant difference between groups. Lactate was increased following TH and NH more than SL method (P<0.05). Each method significantly increased plasma glucose (P<0.05). Work considering time under tension (workTUT) was higher (P<0.05) during TH method than the other methods and during SL it was higher than NH method (P<0.05). Volume load was higher (P<0.05) during NH than the other two methods and during TH it was higher than SL method (P<0.05). CONCLUSION: These results indicate that exercise intensity during the resistance exercise is important for the enhancement of lactate responses, but the slow resistance exercise method could induce acute neuromuscular response as much as high intensity methods. It seems that this method will be advantageous for those who want to increase acute neuromuscular changes with low exercise intensity and volume.
Physiological Responses and Performance Analysis Difference between Official and Simulated Karate Combat Conditions.
Chaabène H, Mkaouer B, Franchini E … +4 more , Souissi N, Selmi MA, Nagra Y, Chamari K
Asian J Sports Med · 2014 Mar · PMID 24868428
PURPOSE: This study aimed to compare physiological responses and time-motion analysis between official and simulated karate combat. METHODS: Ten high-level karatekas participated in this study, which included official an...
PURPOSE: This study aimed to compare physiological responses and time-motion analysis between official and simulated karate combat. METHODS: Ten high-level karatekas participated in this study, which included official and simulated karate combat. RESULTS: Karatekas used more upper-limb attack techniques during official combat compared to simulated ones (6±3 vs 3±1; P=0.05, respectively). For official and simulated karate matches, the numbers of high-intensity actions (i.e. offensive and defensive fighting activity) were 14±6 and 18±5, respectively (P>0.05), lasting from <1s to 5s each. Total fighting activity phase was lower during official compared to simulated matches (21.0±8.2s vs 30.4±9.9s, P<0.01, respectively). Effort (10.0±2.8s) to rest (11.9±2.7s) ratio (E:R) was 1:1 and high-intensity actions (1.6±0.3s) to rest (11.9±2.7s) ratio was higher than 1:7 during simulated combat. During official karate match, the activity and rest duration were 10.0±3.4s and 16.2±4.1s, respectively (E:R ratio 1:1.5), while high-intensity actions were 1.5±0.3s, resulting in an E:R ratio of 1:11. Blood lactate concentration was higher during official (11.14±1.82 mmol.l(-1)) compared to simulated karate combat (7.80±2.66 mmol.l(-1)) (P<0.05). Subjective perceived exertion differed significantly between official and simulated combat (14±2 vs. 12±2; P<0.05, respectively). The majority of karatekas' perceived exertion was higher in the lower limb muscle groups irrespective of the karate combat condition. CONCLUSION: Official and simulated matches differ considerably, therefore coaches should create new strategies during training sessions to achieve the same effort and pause profile of competitive matches and/or that athletes should be submitted to frequent competitions to adapt themselves to the profile of this event.
A Comparison of Anthropometric and Training Characteristics between Female and Male Half-Marathoners and the Relationship to Race Time.
Friedrich M, Rüst CA, Rosemann T … +4 more , Knechtle P, Barandun U, Lepers R, Knechtle B
Asian J Sports Med · 2014 Mar · PMID 24868427 · Full text
PURPOSE: Lower limb skin-fold thicknesses have been differentially associated with sex in elite runners. Front thigh and medial calf skin-fold appear to be related to 1,500m and 10,000m time in men but 400m time in women...
PURPOSE: Lower limb skin-fold thicknesses have been differentially associated with sex in elite runners. Front thigh and medial calf skin-fold appear to be related to 1,500m and 10,000m time in men but 400m time in women. The aim of the present study was to compare anthropometric and training characteristics in recreational female and male half-marathoners. METHODS: The association between both anthropometry and training characteristics and race time was investigated in 83 female and 147 male recreational half marathoners using bi- and multi-variate analyses. RESULTS: In men, body fat percentage (β=0.6), running speed during training (β=-3.7), and body mass index (β=1.9) were related to half-marathon race time after multi-variate analysis. After exclusion of body mass index, r (2) decreased from 0.51 to 0.49, but body fat percentage (β=0.8) and running speed during training (β=-4.1) remained predictive. In women, body fat percentage (β=0.75) and speed during training (β=-6.5) were related to race time (r (2) =0.73). For women, the exclusion of body mass index had no consequence on the predictive variables for half-marathon race time. CONCLUSION: To summarize, in both female and male recreational half-marathoners, both body fat percentage and running speed during training sessions were related to half-marathon race times when corrected with co-variates after multi-variate regression analyses.
Common sports-related infections: a review on clinical pictures, management and time to return to sports.
Ahmadinejad Z, Alijani N, Mansori S … +1 more , Ziaee V
Asian J Sports Med · 2014 Mar · PMID 24868426 · Full text
There is a relationship between exercise and changes in immunity. So athletes are prone to different medical problems such as injuries and infections. Infection is an important medical problem which could be a reason for...
There is a relationship between exercise and changes in immunity. So athletes are prone to different medical problems such as injuries and infections. Infection is an important medical problem which could be a reason for athletes' absence from training. The relationship between physical activity and immune system, characteristics of different types of infections in athletes with emphasis on special clinical presentations or complications, time to return to physical activity and training and strategies to prevent development and transmission of infections in athletes or physically active people are the main topics of this review.
Possibility of Delay in the Super-Compensation Phase due to Aging in Jump Practice.
Mitsumune T, Kayashima E
Asian J Sports Med · 2013 Dec · PMID 24800005 · Full text
PURPOSE: To investigate the possibility of a delay in the super-compensation phase due to aging in jump practice. METHODS: This study evaluated records in three phases (approximately every five years) of a man who had be...
PURPOSE: To investigate the possibility of a delay in the super-compensation phase due to aging in jump practice. METHODS: This study evaluated records in three phases (approximately every five years) of a man who had been participating in Masters Athletics for over 20 years. After correcting for air temperature, which would influence the distance on a standing five-step jump using simple regression analysis, the performance curve of the super-compensation phase was calculated at each phase by curvilinear estimation to assess the relationship between the training interval and distance on the standing five-step jump. RESULTS: A peak distance on the standing five-step jump was achieved after a training interval of 60 hours in the first phase; 75 hours in the second phase; and 88 hours in the third phase. That is, the peak distance tended to delay with aging. CONCLUSION: It may be suggested that the super-compensation period would be delayed by aging in jump practice. We would like master athletes to refer this result and improve their performance.
Evaluation of Relationship between Trunk Muscle Endurance and Static Balance in Male Students.
Barati A, Safarcherati A, Aghayari A … +2 more , Azizi F, Abbasi H
Asian J Sports Med · 2013 Dec · PMID 24800004 · Full text
PURPOSE: Fatigue of trunk muscle contributes to spinal instability over strenuous and prolonged physical tasks and therefore may lead to injury, however from a performance perspective, relation between endurance efficien...
PURPOSE: Fatigue of trunk muscle contributes to spinal instability over strenuous and prolonged physical tasks and therefore may lead to injury, however from a performance perspective, relation between endurance efficient core muscles and optimal balance control has not been well-known. The purpose of this study was to examine the relationship of trunk muscle endurance and static balance. METHODS: Fifty male students inhabitant of Tehran university dormitory (age 23.9±2.4, height 173.0±4.5 weight 70.7±6.3) took part in the study. Trunk muscle endurance was assessed using Sørensen test of trunk extensor endurance, trunk flexor endurance test, side bridge endurance test and static balance was measured using single-limb stance test. A multiple linear regression analysis was applied to test if the trunk muscle endurance measures significantly predicted the static balance. RESULTS: There were positive correlations between static balance level and trunk flexor, extensor and lateral endurance measures (Pearson correlation test, r=0.80 and P<0.001; r=0.71 and P<0.001; r=0.84 and P<0.001, respectively). According to multiple regression analysis for variables predicting static balance, the linear combination of trunk muscle endurance measures was significantly related to the static balance (F (3,46) = 66.60, P<0.001). Endurance of trunk flexor, extensor and lateral muscles were significantly associated with the static balance level. The regression model which included these factors had the sample multiple correlation coefficient of 0.902, indicating that approximately 81% of the variance of the static balance is explained by the model. CONCLUSION: There is a significant relationship between trunk muscle endurance and static balance.
Right ventricle chamber of young trained athletes: morphology and function.
De Luca A, Stefani L, Galanti G
Asian J Sports Med · 2013 Dec · PMID 24800003 · Full text
PURPOSE: The study of the right ventricular (RV) chamber has been recently improved by use of the 3D method. In young asymptomatic trained athletes, RV is not routinely investigated if not in suspected disease. This stud...
PURPOSE: The study of the right ventricular (RV) chamber has been recently improved by use of the 3D method. In young asymptomatic trained athletes, RV is not routinely investigated if not in suspected disease. This study is designed to test if the 3D method compared to 2D, adds information to study of RV morphology and function, in the early stages of myocardial remodeling of a group of young athletes. METHODS: The RV chamber function was assessed in 25 young trained athletes (20 soccer and 5 basketball) aged 20±3 yrs and compared to 20 sedentary controls by 2D-AC and 3D-RV methods (TomTec), measuring RV diastolic (RVDV) and systolic (RVSV) volumes or ejection fraction (EF). RESULTS: 3D RV volumes were slightly higher in athletes than the 2D volumes in presence of lower EF values, but not significantly higher than in sedentary. Significant differences were conversely found comparing 3D systolic and diastolic RV volumes and 2D-AC volumes within each group with higher values in athletes (RVDV: P=0.001 for athletes and P<0.001 for sedentary, and RVSV: P<0.04 for athletes and P<0.001 for sedentary). CONCLUSION: Although the found EF values were substantially similar, the morphological assessment of the initial modifications of this chamber of the young "athlete's heart", results seem to be more accurate using the 3D method than 2D. The clinical implication of this aspect could be of interest in case of difficulty in drawing a clear diagnosis of any RV chamber disease in young athletes.
Agreement Analysis among Measures of Thinness and Obesity Assessment in Iranian School Children and Adolescents.
Ayatollahi SM, Bagheri Z, Heydari ST
Asian J Sports Med · 2013 Dec · PMID 24800002 · Full text
PURPOSE: This study investigated the agreement of four anthropometric-based measurements including weight-for-height (WH), body mass index-for-age (BMI), mid-upper arm circumference-for-age (MUAC) and triceps skinfold th...
PURPOSE: This study investigated the agreement of four anthropometric-based measurements including weight-for-height (WH), body mass index-for-age (BMI), mid-upper arm circumference-for-age (MUAC) and triceps skinfold thickness-for-age (TST) to identify underweight and overweight children and adolescents. METHODS: Two data sets were used in this research. The first one was a multistage random sample of 2397 healthy school children in pre-pubertal stage in Shiraz. The second data set consisted of 487 healthy students in pubertal stage and 558 students in post-pubertal stage. The parametric LMS method was used to construct reference centiles curves for each measure. The Kappa statistic was applied to examine the pairwise agreement of the four indices for detecting thinness and obesity. RESULTS: Generally, the pairwise agreement of adiposity measures was higher for identifying obesity than thinness. There was an excellent agreement between WH and BMI for detecting both thin and obese children in almost all subgroups (P<0.001). MUAC had an excellent agreement with BMI in pre-pubertal individuals (P<0.001). However, TST had a weak agreement with the other three indices for detecting thinness and weak to good agreement for classification of obesity. CONCLUSION: The performance of the four anthropometric-based measurements varied by sex and maturity level. MUAC as a simple and low-cost screening tool can also be used as an alternative to BMI for obesity assessment among pre-pubertal groups.
Physiological and Perceived Exertion Responses during International Karate Kumite Competition.
Tabben M, Sioud R, Haddad M … +6 more , Franchini E, Chaouachi A, Coquart J, Chaabane H, Chamari K, Tourny-Chollet C
Asian J Sports Med · 2013 Dec · PMID 24800001 · Full text
PURPOSE: Investigate the physiological responses and rating of perceived exertion (RPE) in elite karate athletes and examine the relationship between a subjective method (Session-RPE) and two objective heart-rate (HR)-ba...
PURPOSE: Investigate the physiological responses and rating of perceived exertion (RPE) in elite karate athletes and examine the relationship between a subjective method (Session-RPE) and two objective heart-rate (HR)-based methods to quantify training-load (TL) during international karate competition. METHODS: Eleven karatekas took part in this study, but only data from seven athletes who completed three matches in an international tournament were used (four men and three women). The duration of combat was 3 min for men and 2 min for women, with 33.6±7.6 min for the first interval period (match 1-2) and 14.5±3.1 min for the second interval period (match 2-3). HR was continuously recorded during each combat. Blood lactate [La(-)] and (RPE) were measured just before the first match and immediately after each match. RESULTS: Means total fights time, HR, %HRmax, [La(-)], and session-RPE were 4.7±1.6 min, 182±9 bpm, 91±3%, 9.02±2.12 mmol.L(-1) and 4.2±1.2, respectively. No significant differences in %HRmax, [La(-)], and RPE were noticed across combats. Significant correlations were observed between RPE and both resting HR (r=0.60; P=0.004) and mean HR (r=0.64; P=0.02), session-RPE and Banister training-impulse (TRIMP) (r=0.84; P<0.001) and Edwards TL (r=0.77; P<0.01). CONCLUSION: International karate competition elicited near-maximal cardiovascular responses and high [La(-)]. Training should therefore include exercise bouts that sufficiently stimulate the zone between 90 and 100% HRmax. Karate coaches could use the RPE-method to follow competitor's competition loads and consider it in their technical and tactical training.
Gender difference of aerobic contribution to surface performances in finswimming: analysis using the critical velocity method.
Oshita K, Ross M, Koizumi K … +2 more , Tsuno T, Yano S
Asian J Sports Med · 2013 Dec · PMID 24800000 · Full text
PURPOSE: Finswimming is a speed competition sport practiced on the surface or underwater, by using monofins or two fins. In surface events (SF), competitors should surface within 15 m after the start and any turns. The a...
PURPOSE: Finswimming is a speed competition sport practiced on the surface or underwater, by using monofins or two fins. In surface events (SF), competitors should surface within 15 m after the start and any turns. The aim of this study was to investigate the gender differences in the aerobic contribution to SF performances in finswimming, using the critical velocity (CV) concept in the analysis. METHODS: The participants were sixteen monofin swimmers (eight males and eight females; 24±6 years). During a two-day period, participants performed maximal effort swimming at five test distances (100 m, 200 m, 400 m, 800 m and 1500 m), and mean swimming velocity (V) of each distance was calculated. CV was calculated as the slope of the regression line between time and distance in the 400 and 800 m SF tests. RESULTS: Although CV was significantly correlated with V800 m and V1500 m for males, it was significantly correlated with V200 m, V400 m, V800 m and V1500 m for females. CONCLUSION: The present results suggest that although the aerobic performance might contribute to SF performance for events from medium distance (i.e. 200m) to long distance (i.e. 1500m) in female participants, it might contribute to the long distance SF performances in male participants.
Naproxen Twice Daily Versus as Needed (PRN) Dosing: Efficacy and Tolerability for Treatment of Acute Ankle Sprain, a Randomized Clinical Trial.
Hajimaghsoudi M, Jalili M, Mokhtari M … +3 more , Nejati A, Mesbahi J, Paydary K
Asian J Sports Med · 2013 Dec · PMID 24799999 · Full text
PURPOSE: This study was conducted to compare the efficacy and safety of naproxen 500 mg twice daily (BID) versus naproxen 500 mg as needed (PRN) for treatment of ankle sprain. METHODS: In this seven-day, randomized, para...
PURPOSE: This study was conducted to compare the efficacy and safety of naproxen 500 mg twice daily (BID) versus naproxen 500 mg as needed (PRN) for treatment of ankle sprain. METHODS: In this seven-day, randomized, parallel group trial, 135 patients with ankle sprain occurring less than 48 hours prior to the first dose of study medication were randomized to receive naproxen 500 mg BID (67 patients) and naproxen 500 mg as needed (PRN) (68 patients). The ankle pain was assessed at rest and on full weight bearing using Numeric Rating Scale (NRS) from 0 (no pain) to 10 (the worst imaginable pain). Ankle swelling was assessed as a 4-point scale ranging from 0 (no swelling) to 3 (severe swelling) rated by the investigator. The primary efficacy end point was the patient's assessment of ankle pain via NRS and the degree of swelling on day seven. RESULTS: Results showed a significant decrease in pain on weight bearing, pain at rest and the extent of swelling (P<0.001) in both groups, but there was no substantial difference between the two groups (P>0.05) after seven days. Assessing the safety profile of the two different dosing, 13.3% of the naproxen BID group and 6.7% of the as needed group had adverse events, showing that the as needed regimen was safer (P<0.001). CONCLUSION: Results showed that naproxen as needed may reduce the pain and edema of the sprained ankle with no significant difference compared to the BID regimen, while it possesses better safety profile and lower total drug use.
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