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Relationship Between Exercise Capacity And Heart Rate Variability In Trained And Untrained Individuals
Author(s) -
Khanna Deepesh,
Kreider Richard B,
Tonkin P,
Cowan P,
Rasmussen Chris
Publication year - 2011
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.25.1_supplement.lb471
Subject(s) - heart rate variability , medicine , athletes , analysis of variance , anaerobic exercise , heart rate , ambulatory , physical therapy , treadmill , cardiology , blood pressure
PURPOSE To examine the relationship between exercise capacity and measures of heart rate variability (HRV) in trained and untrained males and to determine whether different types of training affect (HRV) in a different manner. METHODS Thirty‐nine male athletes and non‐athletes (21.2±3 yr.) performed a graded maximal exercise test using the Bruce treadmill protocol. Ambulatory Holter monitor was used to record (HRV). The relationship between time to exhaustion and measures of (HRV) were determined using correlation analysis. Additionally, (HRV) for endurance trained, anaerobic‐trained, or non‐trained subjects were compared using one‐way analysis of variance. RESULTS Significant correlations were observed between time to exhaustion and the mean of the R‐R intervals (r = 0.51, p = 0.001) and standard deviations of R‐R intervals during 24‐h (r = −0.38, p = 0.017). Additionally, exercise capacity tended to correlate with the square root of the mean for the sum of squares of differences between adjacent R‐R intervals (52.9±24, r = 0.31, p =0.053) and in the proportion adjacent R‐R intervals having differences of 750 milliseconds (22.7±14, r =0.29, p = 0.07). No significant differences were observed between types of training or measures of HRV. CONCLUSION Exercise training positively affects selected measures of (HRV) and may help decrease risk of arrhythmia or sudden death.