Key result
Eccentric cycling reduces HRV DFA a1 by ~12% vs. concentric cycling over 45 minutes.
Why the study?
Agreement on exercise prescription targets for eccentric cycling has been problematic, motivating exploration of a nonlinear HRV index to correspond to exercise intensity.
Does eccentric cycling alter heart rate variability compared to concentric cycling in male volunteers?
Comparison
45 minutes eccentric cycling vs 45 minutes concentric cycling with matched work rates
Design
Open-label randomized crossover study
Follow-up
45 minutes
Authors
Loading...
May aid ECC intensity monitoring in intolerant patients; hypothesis-generating pending prospective validation.
RCT (n=11)
Open-label
Randomized, counterbalanced crossover
No
Does eccentric cycling alter heart rate variability compared to concentric cycling in male volunteers?
Standardized Mean Difference: 1.087
Absolute Event Rate: 0.877% vs 1.002%
p-value: p=0.004
An initial session of eccentric cycling leads to altered autonomic nervous system balance, reflected by a loss of fractal correlation properties of heart rate variability compared to concentric cycling.
Rogers et al. (2021) conducted an RCT in Healthy volunteers (n=11). Eccentric cycling vs. Concentric cycling was evaluated on DFA a1 (short-term scaling exponent alpha1 of detrended fluctuation analysis) at 45 minutes (d = 1.087, p=0.004). An initial 45-minute session of unaccustomed eccentric cycling led to a significant decrease in the heart rate variability index DFA a1 from 10 to 45 minutes (p=0.004, d=1.087), unlike concentric cycling.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: