Is high-intensity interval training harmful to health?

Excessive exercise training causes mitochondrial functional impairment and decreases glucose tolerance in healthy volunteers

(2021) Mikael Flockhart et al.   Cell Metabolism

High-intensity exercise training — too much of a good thing?

(2021) John A. Hawley et al.   Nature Reviews Endocrinology

World Health Organization 2020 guidelines on physical activity and sedentary behaviour

(2020) Fiona C Bull et al.   BRITISH JOURNAL OF SPORTS MEDICINE

Superior mitochondrial adaptations in human skeletal muscle after interval compared to continuous single-leg cycling matched for total work

(2016) Martin J. MacInnis et al.   JOURNAL OF PHYSIOLOGY-LONDON

Effectiveness of High-Intensity Interval Training (HIT) and Continuous Endurance Training for VO2max Improvements: A Systematic Review and Meta-Analysis of Controlled Trials

(2015) Zoran Milanović et al.   SPORTS MEDICINE

Metabolic and hormonal responses to isoenergetic high-intensity interval exercise and continuous moderate-intensity exercise

(2014) Jonathan M. Peake et al.   AMERICAN JOURNAL OF PHYSIOLOGY-ENDOCRINOLOGY AND METABOLISM