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March 4, 2019Medicine & Science in Sports & Exercise

After 6 weeks, the HIIT group exhibited greater LV mass, diastolic internal diameter, E/A ratio, and early diastolic propagation velocity than the MICT group, and enhanced peak apical radial strain and strain rate during exercise.

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Why the study?

Improved myocardial contractility is a critical circulatory adaptation to exercise training, but the types of exercise that enhance LV contractile and diastolic functions have not been established.

Does high-intensity interval training improve left ventricular mechanics during exercise in healthy sedentary men compared to moderate-intensity continuous training or no exercise?

Comparison

HIIT vs MICT vs non-exercising control

Design

Randomized trial

Follow-up

6 wk

Authors

YHYu-Chieh HuangHTHsing‐Hua TsaiTFTieh‐Cheng Fu

Discussion

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Overview

HIIT may preferentially enhance LV remodeling and mechanics versus MICT in sedentary men; extends intensity-dependent cardiac adaptation data to exercise conditions.

Structured PICO

Does high-intensity interval training improve left ventricular mechanics during exercise in healthy sedentary men compared to moderate-intensity continuous training or no exercise?

P
Population
54 healthy sedentary men
I
Intervention
High-intensity interval training (HIIT) consisting of 3-min intervals at 40% and 80% of V˙O2max for 30 min/day, 5 days/week for 6 weeks
C
Comparator
Moderate-intensity continuous training (MICT) consisting of sustained 60% of V˙O2max for 30 min/day, 5 days/week for 6 weeks, or a no-exercise control group
O
Outcome
Left ventricular mechanics during semiupright bicycle exercise tests measured by two-dimensional speckle-tracking echocardiographysurrogate

High-intensity interval training, but not moderate-intensity continuous training, induces eccentric myocardial hypertrophy and improves left ventricular contractile and diastolic functions during exercise in healthy sedentary men.

Cite This Study

Huang et al. (2019) studied this question.

synapsesocial.com/papers/6a0fa2c02badbc352afe7655https://doi.org/10.1249/mss.0000000000001931
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1High-intensity Interval Training Enhances Hypoxia-mediated Right Cardiac Mechanics in Sedentary Men2020
  2. 2A randomized controlled trial of enhancing hypoxia-mediated right cardiac mechanics and reducing afterload after high intensity interval training in sedentary men2021 · 4 citations
  3. 3Cardiac autonomic and left ventricular mechanics following high intensity interval training: a randomized crossover controlled study2018 · 32 citations
  4. 4A comprehensive analysis of the impact of high-intensity interval vs. moderate-intensity continuous training on global and regional myocardial function in patients early after acute myocardial infarction: the STRAICT randomized controlled trial2025 · 4 citations
  5. 5Echocardiographic Evaluation of the Effects of High-Intensity Interval Training on Cardiac Morphology and Function2016 · 7 citations