The Ab-Slide elicited the greatest EMG activity for the abdominal muscles and the least for the rectus femoris. Post hoc analyses revealed six pairwise differences. We found a muscle × exercise interaction ( F 9,189 = 5.2, p < 0.001). Gender did not affect performance hence, data were collapsed across gender. Post hoc analyses were performed using the Bonferroni-adjusted α to assess between-exercise pair comparisons ( p < 0.002). A two-factor repeated-measures analysis of variance assessed differences in normalized EMG activity among the different exercise variations ( p < 0.05).

We recorded peak EMG activity for each muscle during each of the four exercises and normalized the EMG values by maximum muscle contractions (% MVIC). Electromyographic (EMG) data were recorded using surface electrodes for the rectus abdominis, external oblique, internal oblique, and rectus femoris.

We recruited 10 males and 12 females whose mean (± SD) percent body fat was 10.7 ± 4 and 20.7% ± 3.2%, respectively. J Strength Cond Res 22(6): 1939-1946, 2008-The purpose of this study was to examine the effectiveness of a commercial abdominal machine (Ab-Slide) and three common abdominal strengthening exercises (abdominal crunch, supine double leg thrust, and side bridge) on activating abdominal and minimizing extraneous (nonabdominal) musculature-namely, the rectus femoris muscle. An electromyographic analysis of the Ab-Slide exercise, abdominal crunch, supine double leg thrust, and side bridge in healthy young adults: implications for rehabilitation professionals. Youdas, JW, Guck, BR, Hebrink, RC, Rugotzke, JD, Madson, TJ, and Hollman, JH.

Emg lumbar spine