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the claim

High-intensity interval training causes heart problems in healthy adults.

the verdict
INSUFFICIENT LEANING
Recorded sources
0 sources for · 6 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that high-intensity interval training causes heart problems in healthy adults?

Unclear. Several studies and reviews report that HIIT improves cardiovascular fitness or is feasible without adverse events in healthy adults, but none directly examines whether HIIT causes heart problems in healthy adults. The evidence only partially addresses the claim and does not establish cardiac harm.

Verdict: PARTIAL LEAN · 0 sources for, 6 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence against · 6
High-intensity interval training
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High-intensity interval training. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/High-intensity_interval_training

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More against · 5
Acute Cardiopulmonary Response of High-Intensity Interval Training with Elastic Resistance vs. High-Intensity Interval Training on a Treadmill in Healthy Adults
2023
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Neves, L. N. S., Gasparini-Neto, V. H., Leite, R. D., & Carletti, L. (2023). Acute Cardiopulmonary Response of High-Intensity Interval Training with Elastic Resistance vs. High-Intensity Interval Training on a Treadmill in Healthy Adults. doi.org. https://doi.org/10.3390/ijerph20126061

Effects of High-Intensity Interval Training in Older Adults: A Systematic Review of Randomized and Non-Randomized Intervention Studies.
2026
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P, M., S, F., ND, G., AM, M., P, A., A, M., J, R., & P, F. (2026). Effects of High-Intensity Interval Training in Older Adults: A Systematic Review of Randomized and Non-Randomized Intervention Studies.. doi.org. https://doi.org/10.3390/jcm15176701

Novel All-Extremity High-Intensity Interval Training Improves Aerobic Fitness, Cardiac Function and Insulin Resistance in Healthy Older Adults
2016
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Hwang, C., Yoo, J., Kim, H., Hwang, M., Handberg, E., Petersen, J., & Christou, D. D. (2016). Novel All-Extremity High-Intensity Interval Training Improves Aerobic Fitness, Cardiac Function and Insulin Resistance in Healthy Older Adults. doi.org. https://doi.org/10.1016/j.exger.2016.06.009

Effects of a high-intensity interval training program versus a moderate-intensity continuous training program on maximal oxygen uptake and blood pressure in healthy adults: study protocol for a randomized controlled trial
2016
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Serna, V. H. A., Vélez, E. F. A., Gómez-Arias, R., & Feito, Y. (2016). Effects of a high-intensity interval training program versus a moderate-intensity continuous training program on maximal oxygen uptake and blood pressure in healthy adults: study protocol for a randomized controlled trial. doi.org. https://doi.org/10.1186/s13063-016-1522-y

Effectiveness of High-Intensity Interval Training (HIT) and Continuous Endurance Training for VO2max Improvements: A Systematic Review and Meta-Analysis of Controlled Trials.
2015
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Milanović, Z., Sporiš, G., & Weston, M. (2015). Effectiveness of High-Intensity Interval Training (HIT) and Continuous Endurance Training for VO2max Improvements: A Systematic Review and Meta-Analysis of Controlled Trials.. doi.org. https://doi.org/10.1007/s40279-015-0365-0

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