Tennis

Compared with shoulder-only training and with continued tennis training alone, will the addition of core strengthening to shoulder training produce significantly greater improvements in flat serve ball speed in healthy tennis players? Secondary Hypothesis: * Combined core + shoulder training will produce greater improvement in serve accuracy than shoulder-only training or tennis training alone. * Combined core + shoulder training will produce greater improvement in TGAR than shoulder-only training or tennis training alone. * Combined core + shoulder training will produce greater improvement in core strength/endurance and shoulder rotational strength than the comparator groups.

The goal of this randomized controlled trial is to evaluate the effect of a 4-week core strengthening program on flat serve velocity and arc of shoulder rotation in amateur young adult tennis players . Participants will serve the tennis ball four times during the initial and final flat tennis serve assessments. Furthermore, participants will be divided into two groups and given different strengthening programs. Researchers will compare Group A (shoulder strengthening group) and Group B (core strengthening group) to see if there is any difference between the core and shoulder training programs on the flat serve velocity.