As you age, the rate of regeneration slows due to changes in collagen cross-linking within the tendons, reduced blood flow, and decreased secretion of recovery factors (IGF-1 and TGF-β). However, with regular eccentric exercise, protein intake, and proper load management, you can maintain a functional tendon condition even in your 50s. You can reduce accumulated stress on tendons by adjusting the load, such as by reducing exercise frequency to once or twice a week or by incorporating low-impact activities (like swimming or cycling). The 50s are a period when the body's fundamental energy naturally declines; as a result, the elasticity of bones and tendons decreases, and recovery takes longer. In Korean medicine, exercise-related injuries during this stage are often attributed to a deficiency in fundamental energy and blood. At Dongjedang, we promote tendon regeneration using needle acupuncture and thread embedding, while simultaneously utilizing constitution-specific herbal medicine to replenish fundamental energy and blood, thereby boosting recovery capabilities appropriate for each age group. Our goal is to facilitate a transition to a sustainable exercise routine after recovery, rather than giving up on exercise altogether.