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這個是醫學期刊的... Eight subjects (six males two females) were recruited by flyers posted in a rehabilitation hospital and underwent surface electromyographic (sEMG) assessment while performing the prone and supine bridging maneuvers. The target population was between the ages of 18 and 65... 顯示更多 這個是醫學期刊的...

Eight subjects (six males two females) were recruited by flyers posted in a rehabilitation hospital and underwent surface electromyographic (sEMG) assessment while performing the prone and supine bridging maneuvers. The target population was between the ages of 18 and 65 yrs, healthy and without a recent history of back pain. Exclusion criteria included a history of angina, emphysema, abnormality, abdominal or back surgery within the past year, cervical strain, and other pain conditions. The subjects were asked to complete a demographics from for the purpose of establishing age weight, height, gender, and frequency if exercise in an average week.
After becoming familiarized with the test exercises surface electrodes were placed over four muscle groups in a bipolar configuration on the right side of the body: rectus abdominis, external oblique, erector spinae, and hamstring. The rectus abdimins site was centered on the muscle belly midway between the pubis and the umbilicus. The external oblique site was 5 cm above the anterior superior iliac spine. The erector spinae site was 2 cm lateral to the L4-L5 interspace, and the hamstring sire was at the midpoint of the muscle bellies. The hamstring was used instead of the gluteus maximus because of easier access and the technical advantage of less overlying adipose tissue. The skin was prepped by shaving the hair, applying gentle abrasion with an emery biard, and cleansing with an alcohol swab. The paired electrodes were placed perpendicular to the muscle fibers, 3 inches apart. Sensitivity of the amplifier was set at 0.1 mV per division. Custom-written Labview software was used for data acquisition and analysis.

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