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The level of effort, rather than muscle exercise intensity determines strength gain following a six-week training.

Abstract：

AIM:This study investigated the effect of voluntary motor effort during a low-intensity (30% maximal voluntary contraction [MVC]) muscle exercise training program on increasing muscle strength. MATERIALS AND METHODS:Eighteen young and healthy individuals were randomly assigned to one of three groups: high mental effort (HME), low mental effort (LME), or a no-training control (CTRL) group. Training lasted for 6weeks (15min/day, 5days/week). The participants' right-elbow flexor muscle strength was measured before and after the training program. KEY FINDINGS:After training, the HME group gained 20.47±8.33% (P=0.01) strength while the LME and CTRL groups had negligible strength changes (1.89±0.96% and -3.27±2.61%, respectively; P>0.05) despite muscle contraction intensity (30% MVC) sustained during training was the same for the HME and LME groups. These results suggest that the level of effort involved in resistance exercise training plays a critical role in determining the amount of strength augmentation. SIGNIFICANCE:The finding that high effort combined with low-level physical exercise training can significantly increase muscle strength has rehabilitation applications as many patients and frail older adults have difficulties in participating in high-intensity exercise training such as lifting heavy weights. High effort plus low-level muscle exercise might serve as a safe training regimen for effective muscle strengthening in vulnerable populations.

journal_name

Life Sci

journal_title

Life sciences

authors

Jiang CH,Ranganathan VK,Siemionow V,Yue GH

doi

10.1016/j.lfs.2017.04.003

subject

Has Abstract

pub_date

2017-06-01 00:00:00

pages

30-34

eissn

0024-3205

issn

1879-0631

pii

S0024-3205(17)30121-2

journal_volume

178

pub_type

杂志文章,随机对照试验

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