Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2005) 04, 9 - 17

Research article
Heart Rate Recovery After Exercise and Neural Regulation of Heart Rate Variability in 30-40 Year Old Female Marathon Runners
Na Du1, , Siqin Bai1, Kazuo Oguri2, Yoshihiro Kato1, Ichie Matsumoto1, Harumi Kawase3, Toshio Matsuoka1
Author Information
1 Department of Sports Medicine and Sports Science, Gifu University Graduate School of Medicine, Japan
2 Faculty of Management, Shizuoka Sangyo University, Japan
3 Section of Clinical Laboratory, Gifu University Hospital, Japan

Na Du
‚úČ Department of Sports Medicine and Sports Science, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan
Email: g2103004@guedu.cc.gifu-u.ac.jp
Publish Date
Received: 05-10-2004
Accepted: 07-12-2004
Published (online): 01-03-2005
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ABSTRACT

The aim of the present study was to examine the effects of endurance training on heart rate (HR) recovery after exercise and cardiac autonomic nervous system (ANS) modulation in female marathon runners by comparing with untrained controls. Six female marathon runners (M group) aged 32-40 years and eight age-matched untrained females (C group) performed a maximum-effort treadmill running exercise. Maximal oxygen uptake (VO2max) was measured during the exercise with a gas analyzer connected to subjects through a face mask. Heart rate, blood pressure and blood lactate were measured before and after the exercise. Rating of perceived exertion (RPE) to the exercise was obtained immediately after the exercise. Holter ECG was recorded and analyzed with power spectral analysis of heart rate variability (HRV) to investigate the cardiac ANS modulation. The M group had significantly higher VO2max, faster HR recovery after exercise, higher Mean RR, SDRR, HF power and lower LF/HF ratio at rest compared with the C group. The M group also presented greater percent decrease of blood pressure after exercise, although their blood pressure after exercise was higher than the C group. It is suggested that endurance training induced significant alterations in cardiac ANS modulation at rest and significant acceleration of HR recovery after exercise in female marathon runners. Faster HR recovery after exercise in the female marathon runners should result from their higher levels of HRV, higher aerobic capacity and exaggerated blood pressure response to exercise compared with untrained controls.

Key words: Heart rate recovery, heart rate variability, female marathon runner


           Key Points
  • The effects of endurance training on HR recovery after exercise and cardiac ANS modulation were investigated in female marathon runners by comparing with untrained controls.
  • Time and frequency domain analysis of HRV was used to investigate cardiac ANS modulation.
  • As compared with untrained controls, the female marathon runners showed faster HR recovery after exercise, which should result from their higher levels of HRV, higher aerobic capacity and exaggerated blood pressure response to exercise.
 
 
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