Heidi Weberruss1, Johannes Maucher2, Renate Oberhoffer1, Jan Müller3. 1. Faculty of Sport and Health Sciences, Institute of Preventive Pediatrics, Technical University of Munich, Uptown München-Campus D, Georg-Brauchle-Ring 60/62, 80992, Munich, Germany. 2. Computer Science and Media, Media University Stuttgart, Stuttgart, Germany. 3. Faculty of Sport and Health Sciences, Institute of Preventive Pediatrics, Technical University of Munich, Uptown München-Campus D, Georg-Brauchle-Ring 60/62, 80992, Munich, Germany. j.mueller@tum.de.
Abstract
OBJECTIVE: The body's adaptation to physical exercise is modulated by sympathetic and parasympathetic (vagal) branches of the autonomic nervous system (ANS). Heart rate variability (HRV), the beat-to-beat variation of the heart, is a proxy measure for ANS activity, whereas blood pressure (BP) is an indicator for cardiovascular function. Impaired vagal activity and lower BP is already described after exercise. However, inconsistent results exist about how long vagal recovery takes and how long post-exercise hypotension persists. Therefore, the aim of this study was to assess HRV and BP 1 h after maximal cardiopulmonary exercise testing (CPET). PATIENTS AND METHODS: HRV (Polar RS800CX), peripheral and central BP (Mobil-O-Graph®) were prospectively studied in 107 healthy volunteers (47 female, median age 29.0 years) in supine position, before and 60 min after maximal CPET. RESULTS: One hour after terminating CPET measures of HRV were still impaired and post-exercise BP was significantly reduced suggesting an improved vascular function compared to pre levels. HRV parameters post-exercise were 34.7% (RMSSD), 67.2% (pNN50), 57.2% (HF), and 42.7% (LF) lower compared to pre-exercise levels (for all p < 0.001). Median reduction in BP was 5 mmHg for systolic BP (p < 0.001), and 4 mmHg for diastolic BP (p = 0.016) and central systolic post-exercise (p = 0.005). CONCLUSIONS: One hour after terminating strenuous exercise, autonomic nervous regulation seems to be postponed which is reflected in reduced HRV, whereas the early recovery of the vasculature, post-exercise hypotension, is still preserved over the recovery period of 1 h.
OBJECTIVE: The body's adaptation to physical exercise is modulated by sympathetic and parasympathetic (vagal) branches of the autonomic nervous system (ANS). Heart rate variability (HRV), the beat-to-beat variation of the heart, is a proxy measure for ANS activity, whereas blood pressure (BP) is an indicator for cardiovascular function. Impaired vagal activity and lower BP is already described after exercise. However, inconsistent results exist about how long vagal recovery takes and how long post-exercise hypotension persists. Therefore, the aim of this study was to assess HRV and BP 1 h after maximal cardiopulmonary exercise testing (CPET). PATIENTS AND METHODS: HRV (Polar RS800CX), peripheral and central BP (Mobil-O-Graph®) were prospectively studied in 107 healthy volunteers (47 female, median age 29.0 years) in supine position, before and 60 min after maximal CPET. RESULTS: One hour after terminating CPET measures of HRV were still impaired and post-exercise BP was significantly reduced suggesting an improved vascular function compared to pre levels. HRV parameters post-exercise were 34.7% (RMSSD), 67.2% (pNN50), 57.2% (HF), and 42.7% (LF) lower compared to pre-exercise levels (for all p < 0.001). Median reduction in BP was 5 mmHg for systolic BP (p < 0.001), and 4 mmHg for diastolic BP (p = 0.016) and central systolic post-exercise (p = 0.005). CONCLUSIONS: One hour after terminating strenuous exercise, autonomic nervous regulation seems to be postponed which is reflected in reduced HRV, whereas the early recovery of the vasculature, post-exercise hypotension, is still preserved over the recovery period of 1 h.
Authors: Thomas Weber; Siegfried Wassertheurer; Martin Rammer; Edwin Maurer; Bernhard Hametner; Christopher C Mayer; Johannes Kropf; Bernd Eber Journal: Hypertension Date: 2011-09-12 Impact factor: 10.190
Authors: K Imai; H Sato; M Hori; H Kusuoka; H Ozaki; H Yokoyama; H Takeda; M Inoue; T Kamada Journal: J Am Coll Cardiol Date: 1994-11-15 Impact factor: 24.094