Chronic stress can have a detrimental impact on physical fitness by leading to increased levels of cortisol, a hormone that can promote fat storage and reduce muscle mass when elevated over time. Chronic stress can also lead to fatigue, decreased motivation, and impair recovery processes, making it difficult for individuals to maintain consistent exercise routines. Furthermore, it may increase the risk of burnout or injuries. Addressing stress management through techniques like mindfulness, relaxation, and proper recovery strategies is critical for sustaining physical fitness and overall health.