Eur J Appl Physiol (2017) 117:1897–1906 DOI 10.1007/s00421-017-3673-2 ORIGINAL ARTICLE Longer exercise duration delays post‑exercise recovery of cardiac parasympathetic but not sympathetic indices 1 1 2 1 Scott Michael · Ollie Jay · Kenneth S. Graham · Glen M. Davis Received: 25 November 2016 / Accepted: 26 June 2017 / Published online: 12 July 2017 © Springer-Verlag GmbH Germany 2017 Abstract p = 0.005) to 10 min post-exercise (SHORT 2.89 ± 0.80 ms; Purpose This study investigated non-invasive indices LONG 2.46 ± 0.70 ms; p = 0.007). Ln-RMSSD remained of post-exercise parasympathetic reactivation (using heart suppressed below baseline throughout recovery following rate variability, HRV) and sympathetic withdrawal (using both trials (p < 0.001). PEP was the same at end exercise systolic time intervals, STI) following different exercise for both trials (70 ± 6 ms), with exercise duration having durations. no effect on recovery ( p = 0.659). By 10 min post-exercise, Methods 13 healthy males (age 26.4 ± 4.7 years) cycled PEP increased to 130 ± 21 ms (SHORT) and 131 ± 20 ms at 70% heart rate (HR) reserve for two durations—8 min (LONG), which was similar to baseline (p ≥ 0.143). (SHORT) and 32 min (LONG)—on separate occasions: Conclusions Prolonged exercise duration attenuated HRV (including natural logarithm of root mean square of the recovery of HRV indices of parasympathetic reacti- successive differences, Ln-RMSSD) and STI
European Journal of Applied Physiology – Springer Journals
Published: Jul 12, 2017
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