unlikely to do anything for your back.Hed be better off keeping neutral lumbar spine and holding the position on 1 leg.Hes doing repeated flexion and extension of the back.
billysue2 3 years ago
unlikely to do anything for your back.Hed be better off keeping neutral lumbar spine and holding the position on 1 leg.Hes doing repeated flexion and extension of the back.
billysue2 3 years ago