High-Intensity Functional Training Guided by Individualized Heart Rate Variability Results in Similar Health and Fitness Improvements as Predetermined Training with Less Effort.

Autor:	DeBlauw JA; Department of Kinesiology, Kansas State University, Manhattan, KS 66506, USA., Drake NB; Department of Health, Human Performance, and Recreation, Pittsburg State University, Manhattan, KS 66506, USA., Kurtz BK; Department of Kinesiology, Kansas State University, Manhattan, KS 66506, USA., Crawford DA; School of Nutrition, Kinesiology, and Psychological Science, University of Central Missouri, Warrensburg, MO 64093, USA., Carper MJ; Department of Kinesiology, Kansas State University, Manhattan, KS 66506, USA., Wakeman A; School of Nutrition, Kinesiology, and Psychological Science, University of Central Missouri, Warrensburg, MO 64093, USA., Heinrich KM; Department of Kinesiology, Kansas State University, Manhattan, KS 66506, USA.
Jazyk:	angličtina
Zdroj:	Journal of functional morphology and kinesiology [J Funct Morphol Kinesiol] 2021 Dec 13; Vol. 6 (4). Date of Electronic Publication: 2021 Dec 13.
DOI:	10.3390/jfmk6040102
Abstrakt:	Heart rate variability (HRV) may be useful for prescribing high-intensity functional training (HIFT) exercise programs. This study aimed to compare effects of HRV-guided and predetermined HIFT on cardiovascular function, body composition, and performance. Methods: Recreationally-active adults ( n = 55) were randomly assigned to predetermined HIFT ( n = 29, age = 24.1 ± 4.1 years) or HRV-guided HIFT ( n = 26, age = 23.7 ± 4.5) groups. Both groups completed 11 weeks of daily HRV recordings, 6 weeks of HIFT (5 d·week-1), and pre- and post-test body composition and fitness assessments. Meaningful changes in resting HRV were used to modulate (i.e., reduce) HRV-guided participants' exercise intensity. Linear mixed models were used with Bonferroni post hoc adjustment for analysis. Results: All participants significantly improved resting heart rate, lean mass, fat mass, strength, and work capacity. However, no significant between-groups differences were observed for cardiovascular function, body composition, or fitness changes. The HRV-guided group spent significantly fewer training days at high intensity (mean difference = -13.56 ± 0.83 days; p < 0.001). Conclusion: HRV-guided HIFT produced similar improvements in cardiovascular function, body composition, and fitness as predetermined HIFT, despite fewer days at high intensity. HRV shows promise for prescribing individualized exercise intensity during HIFT.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu