Relative Stiffness of Lumbar Spine and Hamstrings Muscle Stretching

"Participants will stretch their hamstrings muscle in standing position with lumbopelvic stiffening technique. Fifteen percent of the body weight will be used to standardize stretching force. During stretching protocol, the participants will be instructed to face the hydraulic table with their hips square, maintain trunk straight up and look straight ahead. Researcher commands during adjusting the bed up, please tense your back rigid. After that, hydraulic bed will be lifted up until force reaches 15 percent of the body weight. Participant will perform 30 seconds/repetition for 4 repetitions with 15 seconds rest between repetitions."

"Participants will be instructed to face the hydraulic table with their hips square, maintain trunk straight up and look straight ahead. The researcher commands During adjusting the bed up, please relax your back. The hydraulic bed will be lifted up until force reaches 15 percent of the body weight. Participant will perform 30 seconds/repetition for 4 repetitions with 15 seconds rest between repetitions."