The primary purpose of this research was to gather information on whether overload placed upon lower extremity muscles during aerobic dance-only classes induce negative adaptations on muscular strength, endurance and, anaerobic capacity due to the inadequate strength and conditioning programs. The second purpose was to determine whether pre-season screenings of injured dancers showed drastic changes in isokinetic mean work, power, and moments before injury occurrence to identify predisposing factors compared to healthy counterparts. Ten healthy and 11 injured adolescent female ballet dancers who experienced anterior cruciate ligament injury during ballet performance participated in this study. Anthropometric measurements, anaerobic power, muscle strength and endurance performance scores were recorded using preliminary testing sessions. Significant correlations were occurred between fatigue parameters of extensor muscles and the decline in knee extension mean work, power, and moment (r=.831, p˂.001; r=.961, p˂.001; r=.969, p˂.001). Fatigue index of flexor muscles was also positively correlated with the decline in mean work, power, and moment parameters of knee flexor muscles at 1-5 to last 5 reps (r=.818, p˂.001; r=.837, p˂.001; r=.931, p˂.001), respectively. As a result, segmental musculoskeletal examinations on anaerobic power, muscle strength and endurance performance revealed that dancers performing aerobic dance only classes are prone to suffer lower extremity injuries and muscular characteristics of ankle, knee and hip muscles also predispose a decreased strength, anaerobic power and endurance performance following an anterior cruciate ligament injury.
Although the physiology of exercise developed with a multidisciplinary approach is dynamic and exciting for the 21st century, it is important to know how to use the laboratory devices and equipments which is essential to conduct scientific researches in this field. Sixteen human performance laboratories in USA and thirteen human performance laboratories (HPL) in Turkey and the current status of the devices and equipments which exist in these laboratories have been examined in this study. The present material in the human performance laboratories was evaluated to provide the measurement based on 7 specific areas (1. Pulmonary functions 2. Muscle strength, endurance and flexibility 3. Walking analysis, biomechanics and movement analysis 4. Cardiovascular functions 5. Body composition 6. Reaction time and balance 7. Competition analysis systems for coaches) determined by the researchers and 43 devices and equipment which should be present in the laboratories were determined with the help of the survey conducted as a result of face-to-face interview. According to the results of the descriptive parameters of the current investigation it was found that devices and equipments that enable to examine lung function, muscle strength and stamina, body composition, isokinetic dynamometers, reaction time and balance tests were relatively prevalent in Turkish HPL while cardiovascular system analysis, gait analysis, biomechanics, motion analysis, video analysis and flexibility measurements were less common compared to American Universities. Consequently, there are similarities and differences between Turkish and American HPLs in terms of devices, measurement tools and equipments which are essential in exercise physiology field.
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