BONE HEALTH STATUS, ISOKINETIC MUSCULAR STRENGTH AND POWER, AND BODY COMPOSITION OF MALAY ADOLESCENT FEMALE SILAT AND TAEKWONDO PRACTITIONERS
Background: This study investigated the differences and correlations of bone health status, isokinetic muscular strength and power, and body composition of Malay adolescent female silat and taekwondo practitioners.
Materials and methods: There were thirty six participants (mean age: 17.31 ± 1.6 years old) with three groups, i.e. sedentary control, silat and taekwondo groups (12 participants per group) in this study. Participant’s percent body fat and fat-free mass were measured. Quantitative ultrasound measurement of bone speed of sound (SOS) (an indicator of bone mineral density) of participants’ legs and arms were measured. BIODEX isokinetic dynamometer was used to measure participant’s knee and shoulder extension and flexion muscular peak torque (strength) and power at 3 angular velocities, i.e. 60˚.s-1, 180˚.s-1 and 300˚.s-1.
Results: There were no statistically significant differences in percent body fat and fat free mass among sedentary control, silat and taekwondo groups. Silat group exhibited statistically higher knee extension and shoulder extension peak torque and power values compared to taekwondo group. However, taekwondo group showed statistically significant higher shoulder flexion peak torque and power values than silat group. Silat and taekwondo groups showed statistically significant strong positive correlations of fat free mass with isokinetic muscular peak torque of arms and legs generally.
Conclusion: Muscular knee and shoulder extension strength and power are important isokinetic variables in silat. Meanwhile muscular shoulder flexion strength and power are important isokinetic variables in taekwondo. These results can be applied to facilitate the development of training programmes for optimal performance of silat and taekwondo practitioners.
Keywords: Bone speed of sound (SOS), Muscular peak torque, Body composition, Silat, Taekwondo