Tennis instructor and analyst John Yandell has found that, on average, a 120-mph serve slows to 82 mph before the bounce, then to 65 mph after the bounce, and finally to 55 mph at the opponent's ...

Objectives: The purpose of this study was to generate population and age-specific descriptive profiles of concentric isokinetic knee extension and flexion strength in elite junior tennis players, and ...

Hinge joints allow flexion and extension only ... This occurs at the shoulder joint during an overarm tennis serve or cricket bowl. Rotation – this is where the limb turns round its long ...

Background Stiff landings with less knee flexion and high vertical ground reaction force have shown to be associated with increased risk of ACL injuries (Leppänen et al. 2016). The association between ...

Flexion – bending a joint ... This occurs at the shoulder joint during an overarm tennis serve. Rotation – this is where the limb moves in a circular movement around a fixed joint towards ...