Exercise-induced plasma volume expansion and post-exercise parasympathetic reactivation

The purpose of this study was to investigate the effect of exercise-induced plasma volume expansion on post-exercise parasympathetic reactivation. Before (D 0 ) and 2 days after (D +2 ) a supramaximal exercise session, 11 men (21.4 ± 2.6 years and BMI = 23.0 ± 1.4) performed 6-min of submaximal runn...

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Veröffentlicht in:	European journal of applied physiology 2009-02, Vol.105 (3), p.471-481
Hauptverfasser:	Buchheit, M., Laursen, P. B., Al Haddad, H., Ahmaidi, S.
Format:	Artikel
Sprache:	eng
Schlagworte:	Biomedical and Life Sciences Biomedicine Blood Erythrocyte Indices - physiology Exercise Exercise - physiology Exercise Test Exercise Tolerance Heart rate Heart Rate - physiology Hematocrit Homeostasis - physiology Human Physiology Humans Male Occupational Medicine/Industrial Medicine Original Article Parasympathetic Nervous System - physiology Physical fitness Plasma Plasma Volume - physiology Running - physiology Sports Medicine Young Adult
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Zusammenfassung:	The purpose of this study was to investigate the effect of exercise-induced plasma volume expansion on post-exercise parasympathetic reactivation. Before (D 0 ) and 2 days after (D +2 ) a supramaximal exercise session, 11 men (21.4 ± 2.6 years and BMI = 23.0 ± 1.4) performed 6-min of submaximal running where heart rate (HR) recovery (HRR) and HR variability (HRV) indices were calculated during the first 10 min of recovery. Relative plasma volume changes (∆PV) were calculated using changes in hematocrit and hemoglobin measured over consecutive mornings from D 0 to D +2 . Parasympathetic reactivation was evaluated through HRR and vagal-related indexes calculated during a stationary period of recovery. Compared with D 0 , ∆PV (+4.8%, P
ISSN:	1439-6319 1439-6327
DOI:	10.1007/s00421-008-0925-1