September 25, 2025Journal of Human KineticsOpen Access

High-Intensity Interval Training and Moderate-Intensity Continuous Training Affect Running Economy in Endurance Runners: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

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HIIT significantly improves running economy compared to MICT, indicating effective training strategies.
Increases in VO2max were more pronounced with MICT, showing varying benefits of each training method.
HIIT-led reductions in blood lactate levels suggest it may enhance endurance performance under specific conditions.
Coaches and runners should select training methods based on desired physiological outcomes to optimize performance.

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Systematic review reports HIIT enhances running economy and delays lactate accumulation in endurance runners, while MICT benefits VO2max.

Feng et al. (2025) studied this question.

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