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University of Stirling



Trunk muscle activation in the back and hack squat at the same relative loads

Clark DR, Lambert M & Hunter A (2019) Trunk muscle activation in the back and hack squat at the same relative loads. Journal of Strength and Conditioning Research, 33 (Supplement 1), pp. S60-S69.

The hack squat (HS) is likely to produce a greater 1 repetition maximum (1RM) compared to the back squat (BS). This can be attributed to the support of the trunk during the HS compared to no support during BS. This support however, may compromise trunk muscle activation (TMA), therefore producing different training adaptations. Accordingly, the purpose of this study was to compare 1RM in BS and HS and TMA at 4 relative loads, 65, 75, 85 and 95% of maximal system mass. Ten males completed 3 test sessions:1) BS and HS 1RM, 2) HS & BS neuromuscular test familiarization, and, 3) Neuromuscular test for 3 reps at 4 loads for BS and HS. BS TMA was significantly greater (p

back squat; hack squat; trunk muscles; neuromuscular; electromyography; corestability

Journal of Strength and Conditioning Research: Volume 33, Issue Supplement 1

Author(s)Clark, David R; Lambert, Michael; Hunter, Angus
Publication date31/07/2019
Publication date online12/07/2017
Date accepted by journal10/07/2017
PublisherLippincott, Williams & Wilkins for National Strength and Conditioning Association
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