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- W2807077368 abstract "Resistance exercise training (RET) is recognized as a health-positive stimulus, but the significance of remodelling of the left ventricle (LV) evoked by RET remains unclear, in part due to the lack of data on LV functional adaptation that accompanies the structural remodelling. PURPOSE: To examine the effects of 12 weeks of RET on LV twist mechanics in healthy men. METHODS: Forty, non-athlete men (age: 23±3 years) were randomized into 12 weeks of whole-body higher-repetition RET (20-25 repetitions/ set to failure at ~30-50% 1RM; n=13), lower-repetition RET (8-12 repetitions/set to failure at ~75-90% 1RM; n=13), or an active control period (n=14). Standard, and speckle tracking echocardiography were performed at baseline, and following the intervention period. RESULTS: Neither 12-week program of RET altered end-diastolic volume, end- systolic volume, or ejection fraction (P>0.05). Similarly, RET did not change total LV twist, untwisting rate, twist-to-shortening ratio, untwisting-to-twist ratio, or longitudinal strain (P>0.05). CONCLUSION: This is the first longitudinal study to assess both LV structure and mechanics after RET in healthy men, suggesting a maintenance of LV structure and mechanics irrespective of loading condition. These results contrast those reported from endurance exercise training and therefore present important insight into the specific contributions of RET to cardiac adaptation, even with strenuous training efforts. Future studies should directly compare the effects of RET and endurance exercise on the structure and function of the heart, and determine whether combined training regimes exceed a health threshold in patient populations. Funded by NSERC grants to MJM (DG-238819-13) and SMP (RGPIN-2015-04613)." @default.
- W2807077368 created "2018-06-13" @default.
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- W2807077368 date "2018-05-01" @default.
- W2807077368 modified "2023-10-01" @default.
- W2807077368 title "Absence of Functional Left Ventricular Adaption With Short-Term Resistance Exercise Training in Young Men" @default.
- W2807077368 doi "https://doi.org/10.1249/01.mss.0000538793.71399.06" @default.
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