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• W2468758957 abstract "Arm swing during running helps to facilitate balance and stability. The connection between shoulder extensors and hip extensors, latissimus dorsi and thoracolumbar fascia, has been suggested as a mechanism to change gait mechanics. No current evidence exists on modifying arm swing for lower extremity mechanics. PURPOSE:To examine the effects of modifying arm swing patterns on hip extension mechanics during running. METHODS:12 healthy participants ran on a treadmill instrumented with a force platform. 3D kinematics and kinetics were collected at 2 paces (self-selected and fixed-3.24 m/s) across 4 different conditions. Subjects ran with a normal running pattern (CON), followed by 3 randomly performed arm-swing conditions: absent arm swing (AAS), exaggerated arm swing (EAS), and modified arm swing (MAS) focusing on shoulder extension. The conditions were repeated at the fixed pace. Bilateral hip extension angle, moment, and power were calculated during the stance phase of running. Peak hip extension angle, moment and power generation were compared using 2-factor ANOVAs (speed x swing condition) with an alpha level of 0.05. RESULTS: Left and right results were consistent. Data are reported from the left side only. There were no differences found when comparing the 4 arm-swing conditions across speeds in peak hip extension (Mean (SD) in degrees: CON=17.05 (8.74); AAS=17.31( 8.85); EAS=17.80 (8.66); MAS=16.62 (8.60), p=0.98) or peak hip moment (Mean (SD) in Nm/kg: CON=1.38 (0.32); AAS=1.53 ( 0.45); EAS=1.48, (0.41); MAS=1.36 ( 0.38), p=0.47). Further, there were no differences between speeds for angle (SS=16.51(8.35), Fix=17.88(8.81) p=0.50) or moment (SS=1.37(0.36), Fix=1.50(0.42) p=0.17). There were no interactions in angle, moment, or power. There was a significant difference in peak power generation for the main effect of speed (Mean (SD) in W/kg: SS=3.33(1.14), Fix=4.11(1.28), p<0.01). CONCLUSIONS: Based on the results, modifying arm swing does not have an effect on lower extremity mechanics during running. Peak hip power generation increased when subjects ran at the fixed (faster) pace, likely because joint power calculation is directly related to joint velocity. Further study is warranted to determine if modifying arm swing may affect secondary plane motions, variability of movement or performance." @default.
• W2468758957 created "2016-07-22" @default.
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• W2468758957 date "2015-05-01" @default.
• W2468758957 modified "2023-09-27" @default.
• W2468758957 title "The Effects of Modified Arm Swings on Hip Extension Angle, Moment and Power during Running" @default.
• W2468758957 doi "https://doi.org/10.1249/01.mss.0000478969.78704.32" @default.
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