This study discusses the impact of a sedentary lifestyle on health, particularly in relation to shortening of the hamstring muscle and its reduced flexibility. With increased sitting time and reduced physical activity, the hamstrings undergo structural changes that can lead to problems such as muscle weakness, decreased physical strength, muscle imbalances, and an increased risk of musculoskeletal injuries. These problems not only affect individuals’ sports performance, but may also cause movement abnormalities in the long term.

Various stretching methods have been proposed to improve the flexibility and function of the hamstring muscle. Among them, PNF (Progressive Neuromuscular Facilitation) and MET (Muscle Energy Technique) stretching methods have received attention due to their significant effect on increasing range of motion and reducing muscle stiffness. Studies have shown that these techniques can improve muscle function and reduce the risk of injuries associated with muscle shortening.

The aim of this study was to compare the effects of three stretching techniques—MET, PNF, and static stretching—on strength, balance, and flexibility in individuals with hamstring muscle shortening. This study could help develop more targeted intervention programs to improve muscle health and motor function.