Abstract：
:The aims of the study were to determine whether heart rate variability (HRV) measured at rest and during exercise could be altered by an exercise training programme designed to increase walking performance in patients with peripheral arterial disease. Forty-four volunteers were randomised into 12 weeks of either: supervised walking training twice weekly for 30 min at 75% VO2peak (SU), home-based walking training sessions: twice weekly, 30 min per week (HB) or no exercise (CT). HRV measures were calculated from a 5-min resting ECG. Each patient then underwent maximal, graded exercise treadmill testing. All measures were repeated after 12 weeks. The SU group showed significantly (p < 0.001) increased maximal walking time (MWT) but no change in VO2peak. There were no statistically significant changes in any of the measures of HRV in any group. Effect sizes for change in HRV measures were all very small and in some cases negative. Improved walking performance was not accompanied by central cardiorespiratory or neuroregulatory adaptations in the present study. The lack of any change in HRV was possibly due to either the low intensity or discontinuous nature of exercise undertaken. Key pointsIt is known that exercise can positively influence heart rate variability in some cardiac patients.It is known that exercise can increase walking performance in peripheral vascular disease patients.Exercise training improved walking performance in peripheral vascular disease patients but HRV was unaltered.This may be due to low overall physiological demands on the cardiovascular system or the intermittent nature of the exercise.
journal_name
J Sports Sci Medjournal_title
Journal of sports science & medicineauthors
Sandercock GR,Hodges LD,Das SK,Brodie DAsubject
Has Abstractpub_date
2007-12-01 00:00:00pages
471-6issue
4issn
1303-2968journal_volume
6pub_type
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