2.3. Variables and Measurements
ROM of hip. To evaluate the hip ROM, hamstring flexibility (mm) was evaluated with a modified sit-and-reach test (MSR) before, during (at 30 s), and at the end of the intervention (at 2 min). This test was selected based on its wide use by clinicians to evaluate hamstring flexibility and its good correlation coefficient [The subject’s discomfort sensation was measured using the Borg rating of perceived exertion scale (RPE). The participants were asked at the end of the intervention to give a number from 1 to 10, were 1 was the easiest and 10 was the hardest (