Relationship between Resting Heart Rate Variability and Heart Rate Recovery from Exercise in College-Aged Men
Year: 2016
Type: article
Study design: Observational Study
Abstract: Resting heart rate variability (HRV) and heart rate recovery (HRR) from exercise are indices of autonomic function that have been used as clinical and training tools. Results have been mixed as to whether there is a relationship between HRV and HRR, with HRR often measured as delta 60. PURPOSE:. To determine the relationship between HRV and HRR with a focus on a previously-unstudied, yet validated, vagal index of HRR, T30. METHODS:. Males (N = 23) aged 18 to 25 years (body fat: 14.7 ± 6.4%) of varying fitness (VO2Max: 42.8 ± 7.1 ml/kg/min) were studied. HRV was measured for 5 min in the supine position, in the time (i.e., SDNN) and frequency (i.e., HF power, normalized HF power [HFnu], LF power, normalized LF power [LFnu], and LF:HF ratio) domains. Two HRR indices were assessed during passive recovery from cycle ergometer exercise: 1) T30 (i.e., negative reciprocal of the slope of the regression line of natural log of HR data for 30 sec after exercise; measured after 8 min steady state exercise at 40% VO2Max) and 2) delta 60 (i.e., HR at the end of exercise minus HR at 1 min recovery; measured after exercise terminated at 85% max HR). A logarithm transformation was applied to variables violating normality. Pearson product correlations were used to assess the relationship between HRV and HRR. RESULTS:. Except for a significant negative correlation between LogT30 and LogLF (r = -.45, p < .05) no significant relationships were found between HRV and HRR. T30 was significantly related to delta 60 (r = -.68, p < .001) but neither body fat nor aerobic fitness related to any of the HRV or HRR measures. CONCLUSION:. Resting HRV may not be related to HRR from exercise; each may assess different aspects of autonomic control.Table: No title available.
Institution: St. Joseph Hospital
Language: English
Subfield: Cardiology and Cardiovascular Medicine
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W2465784243