Effects of Exercise Around the Ventilation Threshold on Renal Blood Flow in Healthy Individuals

Purpose High-intensity exercise reduces renal artery blood flow (RBF) compared to other forms of exercise. However, it is unclear whether moderate-intensity exercise, including those at the ventilation threshold (VT), decreases RBF. Additionally, attenuated renal autoregulation and associated blood...

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Bibliographic Details
Published in:Journal of science in sport and exercise (Online) 2024-02, Vol.6 (1), p.44-51
Main Authors: Fukuta, Yoshitatsu, Arizono, Shinichi, Tanaka, Shinichiro, Kawaguchi, Tomonori, Tsugita, Natsumi, Fuseya, Takahiro, Magata, Junichi, Tawara, Yuuichi, Segawa, Tomonori
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Biomedicine
Blood pressure
Body mass index
Carbon dioxide
Diabetes
Exercise intensity
Flow velocity
Heart rate
Human Physiology
Hypertension
Kidney diseases
Original Article
Ultrasonic imaging
UMIN
UMIN000035598
Veins & arteries
Ventilation
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Summary:Purpose High-intensity exercise reduces renal artery blood flow (RBF) compared to other forms of exercise. However, it is unclear whether moderate-intensity exercise, including those at the ventilation threshold (VT), decreases RBF. Additionally, attenuated renal autoregulation and associated blood flow can cause renal injury in patients with underlying disease. Therefore, this study aimed to confirm the changes in RBF after moderate-level exercise in healthy subjects, which will have implications for the study of renal arterial blood flow in patients with renal failure. Methods Cardiopulmonary exercise tests were performed by 10 healthy male participants (mean age, 31 ± 8 years): 3 min constant work-rate exercise tests, varying in exercise intensity 1 min before VT (pre-VT), after VT (post-VT), and after the respiratory compensation point (RCP). The RBF was measured using ultrasonic inspection equipment following each exercise. The VT was determined using the ventilatory equivalent method (VEQ method), while the RBF was calculated from the time-averaged flow velocity (TAV) and cross-sectional area (CSA). Results At baseline (resting phase), RBF was 461 ± 142 mL/min. While RBFs at pre-VT were not significantly different from those at baseline (482 ± 142 mL/min; P  = 0.82), significant differences were observed at post-VT (289 ± 111 mL/min; P  
ISSN:2096-6709
2662-1371
DOI:10.1007/s42978-022-00216-7