Effect of detraining on ambulatory measures of cardiac autonomic control.

A.D. Goedhart, M. de Vries, J. Kreft, F.C. Bakker, E.J.C. de Geus

Research output: Contribution to JournalArticleAcademicpeer-review


We examined the effect of training state on cardiac autonomic control in a naturalistic setting. Twenty-four vigorous exercisers were compared to age- and sex-matched sedentary controls. The regular exercisers were subjected to a 6-week training program after which they were randomized to 2 weeks of continued training or 2 weeks of detraining. Cardiac autonomic control was measured over a 24-h period by ambulatory recording, using the preejection period (PEP) and respiratory sinus arrhythmia (RSA). Nonexercising controls had a significantly higher ambulatory heart rate (HR) compared to the regular exercisers but comparable 24-h levels of PEP and RSA. In regular exercisers, 2 weeks of detraining did not significantly change the 24-h levels of HR, PEP, or RSA. We conclude that the bradycardia in healthy regular exercisers is the result of a lower intrinsic heart rate rather than a shift in cardiac autonomic balance from sympathetic to vagal control. © 2008 Federation of European Psychophysiology Societies.
Original languageEnglish
Pages (from-to)130-140
JournalJournal of Psychophysiology
Publication statusPublished - 2008


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