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open access

Accepted Manuscript

Effect of high-intensity interval exercise on renal artery hemodynamics in healthy young adults

English (英語)

The Journal of Sports Medicine and Physical Fitness

63(1)

129-35

Minerva Medica

2023-01

2024-05-27

BACKGROUND: High-intensity interval exercise is useful for sustained exercise; however, its effect on renal artery hemodynamics is unclear. This study aimed to evaluate changes in renal artery blood flow velocity due to high-intensity interval exercise. METHODS: Ten healthy adults (age, 23.5±1.2 years) completed high-intensity interval exercise and moderate-intensity continuous exercise protocols on separate days. The high-intensity interval exercise protocol (total duration, 26 min) comprised eight sets of high-intensity exercise sessions at 85% maximum oxygen uptake for 1 min, with intervals of 40% maximum oxygen uptake for 2 min between sets. The moderate-intensity continuous exercise protocol comprised 40 min of exercise at 40% maximum oxygen uptake. Renal artery blood flow velocity and natural log-transformed high frequency spectral power (an index of cardiac parasympathetic nervous system activity) were measured before and after exercise. Additionally, exercise enjoyment was measured using a questionnaire. RESULTS: Renal artery blood flow velocity did not significantly differ between protocols or timepoints for either protocol. However, the natural log-transformed high frequency spectral power was significantly lower with high-intensity interval exercise than with moderate-intensity continuous exercise (P<0.001, F=25.97) during exercise and at 10 min after exercise, and it did not return to pre-exercise levels with high-intensity interval exercise. Moreover, there was no significant difference in exercise enjoyment between the two protocols. CONCLUSIONS: In healthy young adults, high-intensity interval exercise reduces parasympathetic activity; however, it does not produce any significant changes in renal artery hemodynamics after exercise.

Renal artery

学術雑誌論文

This is a postprint version of the article published in The Journal of Sports Medicine and Physical Fitness. This version is free to view and download to private research and study only. Not for redistribution or re-use. ©Edizioni Minerva Medica. The final published article is available online on Minerva Medica website at https://doi.org/10.23736/S0022-4707.22.13652-2. Cite this article as Junji URABE, Kumiko ONO, Junya OKAGAWA, Yuto NAKAYAMA, Ryoga YAMAU, Akira ISHIKAWA; Effect of high-intensity interval exercise on renal artery hemodynamics in healthy young adults. The Journal of Sports Medicine and Physical Fitness 2023 January;63(1):129-35.