Effect of footwear on the biomechanics of loaded back squats to volitional exhaustion in skilled lifters

Brice, Sara M., Doma, Kenji, and Spratford, Wayne (2021) Effect of footwear on the biomechanics of loaded back squats to volitional exhaustion in skilled lifters. Journal of Strength and Conditioning Research. (In Press)

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Abstract

This study examined whether footwear influences the movement dynamics of barbell back squats to volitional exhaustion in experienced lifters. Eleven men (1 repetition maximum [1RM] = 138 ± 19 kg; 1RM % body mass = 168 ± 18%) performed 3 sets (5–12 ± 4 repetitions per set) of loaded barbell back squats to volitional exhaustion using raised-heel and flat-heel footwear. Barbell motion as well as moments, angles, angular velocity, and power in the sagittal plane at the ankle, knee, hip, and lumbopelvis were examined during the second repetition of the first set (Tsecond) and the final repetition of the third set (Tfinal). There were significant reductions (p < 0.05) in lower-limb concentric angular velocity and power output for both footwear conditions. For the raised-heel condition at Tfinal, hip and knee concentric angular velocities were significantly slower (p < 0.05), and knee concentric power output was significantly less (p < 0.05) compared with the flat-heel condition. A reduction in barbell velocity was not observed for the raised-heel condition despite there being reduction in hip and knee angular velocities. Furthermore, no differences were identified in lower-limb joint moments or any of the biomechanical characteristics of the lumbopelvis between the footwear conditions. The findings of this study suggest that neither type of footwear reduced joint loading or improved joint range-of-motion.

Item ID: 67949
Item Type: Article (Research - C1)
ISSN: 1533-4287
Copyright Information: Published Version: (C) National Strength and Conditioning Association. Accepted Version may be made open access in an Institutional Repository under a CC BY-NC license after a 12 month embargo.
Date Deposited: 16 Jul 2021 01:23
FoR Codes: 42 HEALTH SCIENCES > 4207 Sports science and exercise > 420701 Biomechanics @ 50%
51 PHYSICAL SCIENCES > 5199 Other physical sciences > 519999 Other physical sciences not elsewhere classified @ 50%
SEO Codes: 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280112 Expanding knowledge in the health sciences @ 50%
28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences @ 50%
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