Knee joint loading in the open and square stance tennis forehands

摘要: Sandamas, Paul 2013. Knee joint loading in the open and square stance tennis forehands. Department of Biology Physical Activity, University Jyvaskyla. Master's Thesis Biomechanics. 80 pages. The aim this study was to calculate compare resultant forces moments knee An additional incorporate ground reaction shed light on role lower body aiding pelvic rotation these two different types forehand strokes hit by 7 right-handed university team level players were filmed each foot measured simultaneously. A link segment model limbs used along with inverse dynamics approach both knees during forward swing follow-through phases shot. (OS) compared those obtained for (SS) Although average times, peak racket velocities transverse plane similar, significant kinetic differences (P<0.05) recorded joints between strokes. SS created greater abduction left (0.7 0.95 Nm/kg) than OS (0.2 0.32 Nm/kg), respectively. largest external found (0.31 right prior impact (0.24 Nm/kg). Despite this, significantly torque (TZ) generated leg stroke before (0.27 (0.09 data did not support hypothesis that would be stance. Analysis together motion suggests utilises step as an aid rotation, whereas; relies more extension, rotation.