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Cross-education effects of unilateral accentuated eccentric isoinertial resistance training on lean mass and function.
- Source :
-
Scandinavian Journal of Medicine & Science in Sports . Apr2022, Vol. 32 Issue 4, p672-684. 13p. 1 Chart, 2 Graphs. - Publication Year :
- 2022
-
Abstract
- Purpose: We investigated the effects of three different unilateral isoinertial resistance training protocols with eccentric overload on changes in lean mass and muscle function of trained (TL) and contralateral non-trained (NTL) legs. Methods: Physically active university students were randomly assigned to one of three training groups or a control group (n = 10/group). Participants in the training groups performed dominant leg isoinertial squat training twice a week for 6 weeks (4 sets of 7 repetitions) using either an electric-motor device with an eccentric phase velocity of 100% (EM100) or 150% (EM150) of concentric phase velocity or a conventional flywheel device (FW) with the same relative inertial load. Changes in thigh lean mass, unilateral leg-press one-repetition maximum (1-RM), muscle power at 40–80% 1-RM, and unilateral vertical jump height before and after training were compared between the groups and between TL and NTL. Results: No changes in any variable were found for the control group. In TL, all training groups showed similar increases (p < 0.05) in 1-RM strength (22.4–30.2%), lean tissue mass (2.5–5.8%), muscle power (8.8–21.7%), and vertical jump height (9.1–32.9%). In NTL, 1-RM strength increased 22.0–27.8% without significant differences between groups; however, increases in lean mass (p < 0.001) were observed for EM150 (3.5%) and FW (3.8%) only. Unilateral vertical jump height (6.0–32.9%) and muscle power (6.8–17.5%) also increased in NTL without significant differences between training groups. Conclusion: The three eccentric-overload resistance training modalities produced similar neuromuscular changes in both the trained and non-trained legs, suggesting that strong cross-education effects were induced by the eccentric-overload training. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SKELETAL muscle physiology
*RESISTANCE training
*STATISTICS
*MUSCLE contraction
*ANALYSIS of variance
*CONFIDENCE intervals
*LEAN body mass
*EXERCISE physiology
*MEDICAL protocols
*RANDOMIZED controlled trials
*DESCRIPTIVE statistics
*REPEATED measures design
*DATA analysis software
*DATA analysis
Subjects
Details
- Language :
- English
- ISSN :
- 09057188
- Volume :
- 32
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Scandinavian Journal of Medicine & Science in Sports
- Publication Type :
- Academic Journal
- Accession number :
- 156300309
- Full Text :
- https://doi.org/10.1111/sms.14108