This observational study, sponsored by Heba Ahmed Mohamed Ahmed at Cairo University, investigates the impact of menstrual cycle phases on hand grip strength among athletic and non-athletic females aged 16 to 22. The findings could have implications for sports science, women's health, and physical therapy markets, particularly in understanding how hormonal fluctuations may affect athletic performance and rehabilitation strategies. Given the growing interest in personalized health and fitness, the results may also inform product development in sports equipment and health monitoring devices. Competitive analysis should consider existing research in female athletic performance and hormonal influences, as well as potential collaborations with sports organizations and health institutions.