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• W4294795623 abstract "Evidence has shown that isometric stability exercises recruit the core musculature. The double leg bridge exercise targets these muscles, especially the posterior chain, and can be progressed in difficulty by adding an unstable element such as suspension straps. Load cells can be fixed to suspension straps to measure force production during this exercise. PURPOSE:To assess the relationship between surface electromyography (EMG) activity of the rectus abdominis (RA) and erector spinae (ES) to force measured through a load cell fixed to suspension straps during a double leg suspended bridge exercise in physically active individuals with no recent injury. METHODS: EMG sensors were placed on the bilateral RA and ES of forty participants (age 23.3 ± 5.0 years; height 170.2 ± 7.9 cm; mass 69.2 ± 11.2 kg, 20 female, 20 male). A load cell was fixed to the right suspension strap to measure force (lbs). Participants placed one foot in each strap and were instructed to hold a double leg bridge for as long as possible, keeping knees flexed to 90 degrees and thighs aligned with the torso. EMG signals were filtered, and root mean square values used for analyses normalized as a percentage of maximal voluntary isometric contraction (%MVIC). Pearson’s r correlations were calculated to compare each muscle’s %MVIC to force. RESULTS: Bilateral ES %MVIC (right ES: 52.5 ± 7.5%, left ES: 46.8 ± 6.2%) had a strong positive correlation with force (mean force: 47.9 ± 6.8lbs) (right ES: r = .791, p < .0001, left ES: r = .756, p < .0001). Conversely, bilateral RA %MVIC (right RA: 5.2 ± 1.7%, left RA: 7.8 ± 2.1%) had a strong negative correlation with force (right RA: r = -.794, p < .0001, left RA: r = -.735, p < .0001). CONCLUSIONS: As subjects increased force production through the suspension straps, ES activity increased, while RA activity decreased. Understanding how the anterior and posterior core musculature contribute to stability during isometric endurance exercises can be valuable for exercise selection. Our findings suggest the ES provides greater contribution to force production in the double leg suspended bridge. Since this is a novel use of load cell technology, further application should investigate the use of load cells in similar exercises or with injured populations to compare healthy and injured patterns of core muscle activity and force production." @default.
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• W4294795623 date "2022-09-01" @default.
• W4294795623 modified "2023-10-17" @default.
• W4294795623 title "Relationship Between Electromyography And Force During A Double Leg Suspended Bridge Exercise" @default.
• W4294795623 doi "https://doi.org/10.1249/01.mss.0000880632.28180.fe" @default.
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