Association between resting heart rate with cardiac autonomic modulation during and after a resistance exercise

• Published in: Sport sciences for health 2024-12, Vol.20 (4), p.1407-1417
• Main Authors: Garcia, Giliard Lago, da Cruz, Carlos Janssen Gomes, Fontana, Keila Elizabeth, Molina, Guilherme Eckhardt
• Format: Article
• Language: English
• Subjects: Aerobics; Blood pressure; Electrocardiography; Exercise; Heart rate; Human Physiology; Medicine; Medicine & Public Health; Metabolic Diseases; Physical fitness; Physiology; Software; Sports Medicine
• ISSN: 1824-7490; 1825-1234
• DOI: 10.1007/s11332-024-01220-w

Purpose This study correlated the heart rate (HR) dynamics and parasympathetic activity at rest, during and after a resistance exercise (RE) session with resting heart rate (RHR) in young men. Methods The RR-interval series was recorded at rest in the supine (sup) and following the postural change (from supine to orthostatic position) in the orthostatic (ort), as well as during and after 15 min of a RE session in 14 young men. We used RHR value in the supine position and the square root of the mean of the square of successive adjacent R-R intervals difference (rMSSD) as the parasympathetic indexes. The statistical analysis employed Pearson and Spearman correlation tests with a two-tailed p value ≤ 0.05. Results We observed that HR ort , relative variation (∆%) of RHR, and HR and relative (%) heart rate recovery (HRR) at five, ten, and fifteen minutes were correlated with RHR (r = from − 0.80 to 0.89, p  ≤ 0.02). At rest, rMSSD sup , rMSSD ort , and absolute variation (∆) rMSSD were correlated with RHR (r s  = from − 0.53 to − 0.82, p  ≤ 0.049); during RE session, we observed a correlation between ∆rMSSD and ∆%rMSSD with RHR (r s  =  − 0.82 to − 0.68, p  ≤ 0.01) and after a RE session, rMSSD 5–15 min were correlated with RHR (r s  = from − 0.75 to − 0.86, p  ≤ 0.01). Conclusion We concluded that young men with lower RHR showed higher HR dynamics and parasympathetic reactivity at rest, higher parasympathetic withdrawal during the RE session, and higher HRR and parasympathetic reactivation after a RE session.