Work

Progressive Isoinertial Resistance Exercise Promotes More Favorable Cardiovascular Adaptations than Traditional Resistance Exercise in Young Adults

Year: 2023

Type: article

Study designs: Randomized Controlled Trial, Clinical Trial

Abstract: We compared the cardiovascular adaptations to resistance training (RT) using either traditional isotonic or isoinertial resistance exercise in a randomized controlled study. Thirty-one healthy young adults (mean ± SD age = 24 ± 3 y) completed 10 weeks of traditional isotonic RT (TRT; n=6F/5M), isoinertial flywheel RT (FWRT; n=7F/4M) or a habitual activity control (CON; n=5F/3M). Prior to and following the intervention period, blood pressure, blood pressure reactivity, flow-mediated dilation (FMD), carotid-femoral pulse wave velocity (cfPWV), baroreflex sensitivity (BRS), and heart rate variability (RMSSD) were assessed. TRT and FWRT similarly improved isometric muscle strength. TRT significantly increased systolic blood pressure reactivity during isometric exercise compared to both FWRT (mean difference ± 95% CI: +10.8±8.8 mmHg) and CON (+11.8±9.1 mmHg). Cardiovagal BRS was significantly reduced in TRT versus FWRT (-6.82±4.9 ms/mmHg; p = 0.006) but not between TRT versus CON ( p = 0.12) or FWRT versus CON ( p = 0.43). Resting heart rate (RHR) and RMSSD worsened in TRT compared to FWRT (RHR: +8±5.8 bpm, p = 0.006; RMSSD: -22.3±15.6 ms, p = 0.004). Changes in BRS and RMSSD were associated with changes in blood pressure reactivity in the RT groups (r = -0.51 to -0.52). There were no significant changes in FMD or cfPWV in any group ( p > 0.13). In conclusion, 10 weeks of TRT and FWRT resulted in similar improvements in strength, but TRT caused impairments in blood pressure reactivity compared to FWRT and CON and parasympathetic nervous system activity compared to FWRT.

Source: American Journal of Physiology-Heart and Circulatory Physiology

DOI: 10.1152/ajpheart.00402.2023

Authors: Nile F. Banks, Emily M. Rogers, Alexander C. Berry, Nathaniel D.M. Jenkins

Institutions: University of Iowa, University of Wisconsin–Madison

Language: English

Topic: Cardiovascular and exercise physiology

Subfield: Complementary and alternative medicine

Field: Medicine

Domain: Health Sciences

SDG: Good health and well-being

Open Access status: green

Funders: National Strength and Conditioning Association, National Institutes of Health, Centers for Disease Control and Prevention, National Institute of General Medical Sciences