Corticospinal Excitability of Deep Back and Abdominal Muscles

"Participants will stretch the 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 the hips square, maintain trunk straight up and look straight ahead. Researcher commands during adjusting the bed up, please tense the 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 the hips square, maintain trunk straight up and look straight ahead. The researcher commands During adjusting the bed up, please relax the 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."