European Journal of Applied Physiology

, Volume 100, Issue 4, pp 437–444

Endurance training improves post-exercise cardiac autonomic modulation in obese women with and without type 2 diabetes

  • Arturo Figueroa
  • Tracy Baynard
  • Bo Fernhall
  • Robert Carhart
  • Jill A. Kanaley
Original Article
  • 561 Downloads

Abstract

Obesity and type 2 diabetes (T2D) are associated with abnormal cardiovascular autonomic function and increased risk for cardiac complications, especially after exercise. Since improvements at rest are not always observed after training, we investigated changes in resting and post-exercise autonomic function in obese women with and without T2D after16-week of walking training. Heart rate (HR) variability (HRV) and baroreflex sensitivity (BRS) were measured at rest and 20 min after a 20 min bout of treadmill exercise at 65% VO2 peak in obese women with (n = 8) and without T2D (n = 12) before and after training. HRV was analyzed by frequency-domain [high- (HF) power and low-frequency (LF)] and BRS by the sequence method. Exercise training induced similar significant changes in VO2 peak, resting systolic blood pressure (SBP) and post-exercise autonomic function in both groups. Training increased VO2 peak (6%; P < 0.01) and decreased resting SBP (8%; P < 0.001). Increased post-exercise HR recovery (5%; P < 0.001), HF power (14%; P < 0.05), LF power (14%; P < 0.05) and BRS (86%; P < 0.001) were also observed. Resting autonomic function and post-exercise SBP were not altered after training. In conclusion, endurance training reduced blood pressure without changes in HRV and BRS at rest, but training increased HRV and BRS during the recovery of acute endurance exercise indicating an improved post-exercise autonomic modulation of HR, which was similar in obese women with and without T2D.

Keywords

Exercise recovery Walk training Autonomic nervous system Obesity Type 2 diabetes Baroreflex sensitivity 

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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  • Arturo Figueroa
    • 1
  • Tracy Baynard
    • 2
  • Bo Fernhall
    • 3
  • Robert Carhart
    • 4
  • Jill A. Kanaley
    • 2
  1. 1.Department of Nutrition, Food and Exercise SciencesFlorida State UniversityTallahasseeUSA
  2. 2.Department of Exercise SciencesSyracuse UniversitySyracuseUSA
  3. 3.Department of KinesiologyUniversity of IllinoisUrbana-ChampaignUSA
  4. 4.Department of Medicine/CardiologySUNY Upstate Medical UniversitySyracuseUSA

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