Academic journal article Research Quarterly for Exercise and Sport

The Muscle Activation of the Erector Spinae during Hyperextension with and without the Pelvis Restrained. (Biomechanics)

Academic journal article Research Quarterly for Exercise and Sport

The Muscle Activation of the Erector Spinae during Hyperextension with and without the Pelvis Restrained. (Biomechanics)

Article excerpt

Several researchers have reported that weak lumbar musculature may be a cause of low back pain (LBP) and others have demonstrated that strengthening the low back muscles can help relieve LBP. Although there is agreement that the back should be strengthened, isolating the back muscles is not easy. Back extension is often accompanied by posterior pelvic rotation resulting from contraction of the powerful hamstring muscles. Several studies conducted in a seated position have demonstrated that restraining the pelvis inhibits the contribution of the hamstring muscles and better isolates the lumbar extensors. The purpose of this study was to determine if pelvic restraint during hyperextension on a variable angle Roman chair (VARC) changes the muscle activation of the erector spinae musculature. Seventy volunteers (ages 18-35 years) performed hyperextension exercises on the VARC with and without the pelvis restrained. Surface electromyography (EMG) was used to measure the muscle activation of the erector spinae at t he third lumbar vertebra (L3). Total root mean square (RMS) for eccentric and concentric phases were amplitude normalized to a maximal voluntary isometric contraction (MVIC). …

Search by... Author
Show... All Results Primary Sources Peer-reviewed

Oops!

An unknown error has occurred. Please click the button below to reload the page. If the problem persists, please try again in a little while.