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Unilateral high-load resistance training influences strength changes in the contralateral arm undergoing low-load training.
- Source :
- Journal of Science & Medicine in Sport; Aug2023, Vol. 26 Issue 8, p440-445, 6p
- Publication Year :
- 2023
-
Abstract
- Within-subject training models have become common within the exercise literature. However, it is currently unknown if training one arm with a high load would impact muscle size and strength of the opposing arm training with a low load. Parallel group. 116 participants were randomized to one of three groups that completed 6-weeks (18 sessions) of elbow flexion exercise. Group 1 trained their dominant arm only, beginning with a one-repetition maximum test (≤ 5 attempts), followed by four sets of exercise using a weight equivalent to 8–12 repetition maximum. Group 2 completed the same training as Group 1 in their dominant arm, while the non-dominant arm completed four sets of low-load exercise (30–40 repetition maximum). Group 3 trained their non-dominant arm only, performing the same low-load exercise as Group 2. Participants were compared for changes in muscle thickness and elbow flexion one-repetition maximum. The greatest changes in non-dominant strength were present in Groups 1 (Δ 1.5 kg; untrained arm) and 2 (Δ1.1 kg; low-load arm with high load on opposite arm), compared to Group 3 (Δ 0.3 kg; low-load only). Only the arms being directly trained observed changes in muscle thickness (≈ Δ 0.25 cm depending on site). Within-subject training models are potentially problematic when investigating changes in strength (though not muscle growth). This is based on the finding that the untrained limb of Group 1 saw similar changes in strength as the non-dominant limb of Group 2 which were both greater than the low-load training limb of Group 3. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14402440
- Volume :
- 26
- Issue :
- 8
- Database :
- Supplemental Index
- Journal :
- Journal of Science & Medicine in Sport
- Publication Type :
- Academic Journal
- Accession number :
- 171343261
- Full Text :
- https://doi.org/10.1016/j.jsams.2023.06.011