The purpose of this study was to investigate of isokinetic strength of quadriceps and hamstring, hamstrings/quadriceps ration in elite sports athletes to provide the data for injury prevention, fitness level evaluation and training methodology. The subjects selected for this study were 104 elite sports athletes. They didn't have any medical problem. Isokinetic peak torque, flexor/extensor ratio at 60 deg/sec of the knee extension and flexion were measured using an cybex 770. The data were analyzed utilizing One way ANOVA. The level of statistical significance was set at p<.05. On the basis of the results analyzed in this study, conclusion were drawn as follow: 1. Dominant knee extension peak torque (Nm) were no significant differences in man but man elite athletes were higher than woman elite players in 60 deg/sec (p<.05). 2. Dominant knee extension peak torque (% body weight) of man elite athletes were higher than woman elite players in 60 deg/sec except only man volleyball athletes (p<.05). 3. Dominant knee flexion peak torque (Nm) were no significant differences in man but man elite athletes were higher than woman elite players in 60 deg/sec (p<.05). 4. Dominant knee flexion peak torque (% body weight) of man elite athletes were higher than woman elite players in 60 deg/sec (p<.05). 5. Knee flexion/extension peak torque ratio (H : Q) were no significant differences according to sex and proper H : Q ratio was 54~64%.
Anterior Cruciate Ligament ; Athletes ; Female ; Humans ; Knee ; Sports ; Torque ; Volleyball

BACKGROUND: We attempted to study functional and structural changes in the hearts of volleyball players and cardiac effects of a short-term intensive training as disclosed by electrocardiograms(ECG's) and echocardiograms(UCG's). METHODS: In 12 volleyball players of a university team with the mean age and career of 19.9 and 9.2 years, respectively, comparisons of ECG's and UCG's M-mode & Doppler, were made before and after an intensive training of 8 weeks duration. The players have been trained 2-3 hours daily almost year around for many years, and the intensive and comprehensive training given for the current study was 3 hours daily, which included strenuous interval training of 20-30 minutes. The training was divided into two successive sessions. For the first session, the players ran 4km daily as a part of the training for 2 weeks. The second session included repetition of runnging at their maximal speed with short intermissions of stationary running for 6 weekes. RESULTS: The major findings in ECG's were sinus bradycardia(25.0%) and high voltage(33.3%), and those in M-mode UCG's were left ventricular(LV) hypertrophy, LV dilatation or left atrial dilatation being seen in all cases, alone or in combinations. After the training however, there were no significant changes in the incidences of these abnormal findings in ECG's & UCG's, and also in the mean of various echocardiographic parameters reflecting cardiac functions. The E and A waves in Doppler UCG's also showed no changes. The slight but significant changes after the training were limited to the increases in the mean of the sum of S wave in V1 & R wave in V5, and left atrial dimensions. CONCLUSION: In volleyball players who have been regularly trained for many years, the major findings in ECG's were sinus bradycardia and high voltage. Those in UCG's were LV hypertrophy. LV dilatation or left atrial dilation being seen in all cases, alone or in combinations. Nonetheless, after the intensive training of 8 weeks duration, the incidences of these abnormal findings in ECG's and UCG's remained essentially similar, and slight but significant changes were limited to the increases in the sum of S wave in V1 & R wave in V5, and left atrial internal dimensions. These facts suggest that in the regularly trained volleyball players, a short-term intensive training induces only limited cardiac changes as disclosed by ECG's and UCG's.
Bradycardia ; Dilatation ; Echocardiography ; Electrocardiography* ; Heart ; Hypertrophy ; Incidence ; Running ; Volleyball*

PURPOSE: To determine the prevalence of scoliosis in volleyball athletes and compare this with the prevalence in the general population. MATERIALS AND METHODS: One hundred and sixteen volleyball athletes who had been enrolled in the activity for more than one year were examined for prevalence of scoliosis. The Adams forward bending test was performed with a measurement of the truncal asymmetry using a scoliometer (Orthopaedic System, Inc, USA). Those atheletes who showed more than 5degreesof measurement were selected for an X-ray evaluation. Data from a randomized point prevalence survey of Korean Middle school students (46,428) in Seoul City, which had been performed by our department, was adopted for the control group. RESULTS: Among the 116 volleyball players, 60 (51.7%) showed more than a 5degreesof angle of trunk rotation, whereas controls of middle school students showed 2.5%. Cobb's angle more than 10degrees was 6 (5.17%) in athletes and the control group was 465 (1.0%). Despite higher frequency of prevalence, the Cobb' angle was below 15degrees whereas the control group showed a severe scoliosis which of Cobb's angle reaching to 45degrees. CONCLUSION: Volleyball athletes showed a higher incidence of truncal asymmetry and scoliotic spinal columns than the control group. However, we were able to conclude that asymmetrical muscle development can produce a mild scoliosis. However this doesn't have the potential for a severe progression as found in some cases of idiopathic scoliosis.
Athletes* ; Humans ; Incidence ; Muscle Development ; Prevalence ; Scoliosis* ; Seoul ; Spine ; Volleyball*

STUDY DESIGN: Retrospective comparative study using radiographs and clinical findings. PURPOSE: To test the hypothesis that asymmetric loading of immature spines in young athletes initiates scoliosis. OVERVIEW OF LITERATURE: Scoliosis in athletes has been reported in the literature, but its causative factors have not been investigated. METHODS: We compared the incidence, type and magnitude of scoliotic curves in volleyball players with those in the non-player population. One hundred sixteen adolescent volleyball players were grouped for selective screening. Data regarding their playing duration, handedness, age, height, and menarchal status (in girls) were recorded, along with clinical examination and radiological investigation when necessary. We analyzed data from 46,428 non-player school children, and their data were compared to athletes to determine differences. RESULTS: Volleyball players had a statistically significant increase in the incidence of scoliotic spinal curves. Playing hand dominance was related to the curve direction. Cobb angle had no significant correlation with the duration of playing. CONCLUSIONS: There is a five-fold increase in the incidence of mild scoliosis in volleyball players. A high percentage (41%) of asymmetry was present on the Adams forward bending test, as compared to controls. The curves were either thoracic or thoracolumbar.
Adolescent ; Athletes ; Child ; Functional Laterality ; Hand ; Humans ; Incidence ; Mass Screening ; Muscles ; Retrospective Studies ; Scoliosis ; Spine ; Volleyball

OBJECTIVE: To translate the English Victorian Institute of Sport Assessment for patellar tendinopathy (VISA-P) questionnaire into a Korean version and to determine the reliability and validity of the Korean version. METHODS: The English VISA-P questionnaire was translated into Korean according to the internationally recommended guidelines. Then, 28 adolescent elite volleyball athletes (average age, 16 years; range, 14 to 19 years) were asked to complete the questionnaire three times (before examination, after examination, and 1 week later) for reliability. They were evaluated through a physical examination and ultrasonography to diagnosis patellar tendinopathy. RESULTS: The internal consistency of the VISA-P questionnaire by Cronbach's alpha was 0.80 for the first, 0.78 for the second, and 0.79 for the third assessment. The intraclass correlation coefficient (ICC) between the first and second assessments was 0.97. The ICC between the second and third assessments was 0.96. The mean VISA-P scores were 67.6+/-15.7 for the patellar tendinopathy group (n=23) and 92.6+/-8.6 for the normal group (n=5). There were significantly lower VISA-P scores in the patellar tendinopathy group compared to the normal group. CONCLUSION: The translated Korean version VISA-P questionnaire has good internal consistency, test-retest reliability and validity. In addition, this study indicated that most adolescent elite volleyball athletes had patellar tendon problems. Therefore, the Korean version VISA-P is a useful self-administered outcome score of athletes with patellar tendinopathy.
Adolescent* ; Athletes* ; Humans ; Patellar Ligament ; Physical Examination ; Reproducibility of Results* ; Sports ; Tendinopathy* ; Ultrasonography ; Volleyball* ; Surveys and Questionnaires

There is no sport in which the shoulder does not play an integral role. There are many patients with shoulder joint problems in volleyball, baseball, tennis and golf. In volleyball, a quick strong spike is necessary. Therefor, the treatment of shoulder injuries as well as the protection of the shoulder is a great concern of the player. The authors have done and analysis of the playing history and the clinical studies of the volleyball players who have been recorded as patients of the department of orthopedic surgery, Korea National Police hospital, from January 1977 to December 1980. Results of the study are as follows: l. Of the ages between 17 and 25, the average age was 19.9. 2. Out of 228 case studies 96 complained of shoulder pain or 42.1%. 3. The 84, or 87.6% of the players used the posterior angle spike. The anterior angle spikers and middle angle spikers were 6 players or 6.2% each. 4. Of 60 posterior angle spikers attempted to change spiking angle, 46 or 76% were able to alieviable the shoulder pain. 5. In the posterior angle spikers the lever arm is at its shortest extent so the cases of pain were analyzed as due to repeated impingement of supraspinatus tendon.
Arm ; Baseball ; Golf ; Humans ; Korea ; Orthopedics ; Police ; Shoulder Joint ; Shoulder Pain ; Shoulder ; Sports ; Tendons ; Tennis ; Volleyball

This study was done to investigate the 12 college volleyball player's food behavior, nutrient intakes, and their serum lipid levels during the periods of training and detraining and to provide basic data for an effective progrm for the volleyball players during the period fo detraining after the game season. The results were summarized as follows : The total daily energy intake of the players was 3,363+/-339kcal and3,692+/-499kcal during the periods of the training and detraining, respectively. During the training period, daily intakes of protein, calcium and vitamin A, and B2 were lower than the recommended dietary allowance for the players. During the detraining period, the players' daily intakes of calcium, iron, and vitamin A were even lower. However, the consumption of alcohol was dramatically increased during the period of detraining. The levels of serum triglyceride and very low density lipoprotein were significantly increased during the detraining period. Basal metabolic rates were significantly increased after the training period and diastolic pressure was decreased during the detraining period. In conclusion, out results suggest that the detraining of volleyball players for 10 days after intensive training, negatively affects their food behavior and serum lipid concentrations. Therefore, for the improvement of performance for the next game season, a planned program for the players' detraining period should be developed.
Basal Metabolism ; Blood Pressure ; Calcium ; Energy Intake ; Feeding Behavior ; Food Habits* ; Iron ; Lipoproteins ; Recommended Dietary Allowances ; Seasons ; Triglycerides ; Vitamin A ; Volleyball*

Most of axillary nerve injury develops after dislocation of glenohumeral joint, proximal humeral fracture and direct blow to the deltoid muscle. Some cases in volleyball players and athletes playing contact sports like hockey, football have been reported. But axillary nerve injury after swimming with butterfly stroke has not been reported previously. We experienced a 34 year old female who had weakness in abduction and sensory impairment in lateral aspect of right arm after butterfly stroke. She was transferred from local clinic to our Rehabilitation Department because symptoms were not improved despite conservative treatment. We diagnosed her as axillary nerve injury by typical clinical manifestations and electrodiagnostic study. Additionally, we detected type II superior laburum anterior posterior lesion combined with axillary nerve injury in shoulder magnetic resonance image. We should consider possibility of axillary nerve injury in a patient with shoulder pain and weakness after swimming like butterfly stroke.
Adult ; Arm ; Athletes ; Butterflies* ; Deltoid Muscle ; Dislocations ; Female ; Football ; Hockey ; Humans ; Rehabilitation ; Shoulder ; Shoulder Fractures ; Shoulder Joint ; Shoulder Pain ; Sports ; Stroke* ; Swimming* ; Volleyball

Certain motion in the sports of volleyball can cause injury. For examples, excessive spiking, jumping, receiving and rolling may produce strain, sprain and stress fracture, etc. of all extremities and spine. The authors analized injuries of 160 Korean young women volleyball players treated and managed at Department of Orthopedic Surgery, National Police Hospital from September, 1973 to October, 1977. The results were as followings: 1. Of 160 cases, age distribution was ranged from 15 to 26 years and average was 20. 7 years. 2. Out of 495 injuries, 113 (23%) were upper extremities, 93 (19%) were lumbar and lumbosacral regions and 289(58%) were lower extremities. The most common site of injury was knee joint. 3. As to the ratio of the side, in the upper extremities 77% were in the right side and 23% in the left, but in the lower extremities both sides were nearly equal. 4. The injuries were composed of strain, sprain and the others, including stress fracture in 14, linear fracture of patella in 2, chip fracture of ulnar styloid process in 4, H.I.V.D. in 4 and meniscus tear in 6, etc.. 5. The injuries were supposed to be prevalent for the first one month after change from one to another team (14%). 6. The injury was usually more frequent in incidence among the exercise in winter and the heating in Gymnasium also one of the important factors to induce the injury, the injuries were less frequent at the good heating (40%). 7. It was concluded that the career of play did not affect significantly to incidence of the injury.
Age Distribution ; Athletic Injuries ; Extremities ; Female ; Fractures, Stress ; Heating ; Hot Temperature ; Humans ; Incidence ; Knee Joint ; Lower Extremity ; Lumbosacral Region ; Orthopedics ; Patella ; Police ; Spine ; Sports ; Sprains and Strains ; Tears ; Upper Extremity ; Volleyball

A 16-year-old male with a prior history of recurrent syncope was referred to our hospital after being resuscitated from cardiac arrest developed while playing volleyball. His electrocardiogram (ECG) demonstrated ventricular fibrillation at a local emergency department. After referral, an ECG showed bidirectional ventricular tachycardia (VT) and nonsustained Torsade de Pointes. Two days later, his heart rate became regular, and no additional episodes of VT were observed. His ECG showed sinus rhythm with a corrected QT interval of 423 msec, and two-dimensional echocardiography was unremarkable. We made the diagnosis of a catecholaminergic polymorphic VT. However, only premature ventricular complex bigeminy was induced on exercise ECG and epinephrine infusion tests, and the patient showed no episodes of syncope. His father and mother had different missense mutations in the cardiac ryanodine receptor on genetic testing. The proband had both mutations in different alleles and was symptomatic. It was recommended that the patient avoid competitive physical activities, and a beta-blocker was prescribed.
Adolescent ; Alleles ; Catecholamines ; Echocardiography ; Electrocardiography ; Emergencies ; Epinephrine ; Fathers ; Genetic Testing ; Heart Arrest ; Heart Rate ; Humans ; Male ; Mothers ; Motor Activity ; Mutation, Missense ; Referral and Consultation ; Ryanodine Receptor Calcium Release Channel ; Syncope ; Tachycardia ; Tachycardia, Ventricular ; Torsades de Pointes ; Ventricular Fibrillation ; Ventricular Premature Complexes ; Volleyball