FULLBACK not only gives you a stretch of the hamstrings, but also a stretch throughout the back side of the human body connecting the calves, wait and back. After standing on the stepping stone, hold the handles and slowly move onto the lower handles. In this way, it will stretch your calves, hamstrings, waist, back and even your arms. Your calves are connected to your feet and knees,while your hamstrings are connected to pelvis and spine, and your elector spine is connected to your arms and ribs. Also you can stretch your arms, flank, and hip joints by holding the handles sideways in an alternate grip position.