Table 2 Stretching exercises program

1. Stretch in the modified Thomas test position

The subject lies in the supine position on the table and took the modified Thomas test ' position. Meanwhile, the opposite leg was held actively by the participants with the hip and knee in a flexed position against the chest to stabilize the pelvis during the stretching exercise. First, the only force that leads to stretching flexor muscles hip was the weight of the tested limb and progressively a little force was applied in the direction of the knee extension to stretch. The 30-s stretch is performed with 8 s of rest and 10 repetitions

2. Modified launch stretch

Like the half-kneeling position on the floor with a towel or pillow under the knee. The body is straight and by going forward and bending the hip, maximum tension is created in the hip on the side where the knee is bent. The 30-s stretch is performed with 8 s of rest and 10 repetitions [11]

3. Lifting the leg while lying in a prone position with the knee bent

The subject lies in the prone position with the knee flexed to 90° to relax the hamstring, then contract the gluteal muscles as much as possible and lift the hip. The pillow is placed under the abdomen for 30 s with 8 s of rest and 10 repetitions [11]

4. Lifting the leg in a prone position with a straight knee

Like the above exercise with the difference that the knee is straight. The subject lies in the prone position with the knee extended, then contract the gluteal muscles as much as possible and lift the hip. The pillow is placed under the abdomen for 30 s with 8 s of rest and 10 repetitions [11]