Key result
Short-term cycling interval sessions decreased overall variability and complexity of RR-interval fluctuations (p < 0.05), which rebounded to warm-up levels during active recovery.
Why the study?
Assessing non-linear dynamics of heart rate variability provides new opportunities to monitor cardiac autonomic activity, prompting this study to examine the influence of exercise intensity and recovery on heart rate variability.
Does a short-term cycling interval session alter non-linear dynamics of cardiac autonomic activity in well-trained cyclists?
Comparison
Interval sessions vs active recovery periods
Authors
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Interval cycling may transiently alter HRV complexity in trained athletes; leaves open utility for autonomic monitoring in training.
Does a short-term cycling interval session alter non-linear dynamics of cardiac autonomic activity in well-trained cyclists?
p-value: p=<0.05
High-intensity interval cycling decreases HRV complexity, which returns to baseline during active recovery, reflecting systematic reorganization of cardiac autonomic activity.
Gronwald et al. (2019) studied Healthy (endurance trained cyclists) (n=16). Cycling interval session and active recovery vs. Warm-up periods was evaluated on Non-linear dynamics of HRV (DFA-alpha1) and meanRR (p=<0.05). Short-term cycling interval sessions decreased overall variability and complexity of RR-interval fluctuations (p < 0.05), which rebounded to warm-up levels during active recovery.
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