Heart rate variability before and after cycle exercise in relation to different body positions
Barak, O. F.; Jakovljevic, D.; Popadic, Gacesa J. Z.; Ovcin, Z. B.; Brodie, David and Grujic, N. (2010) Heart rate variability before and after cycle exercise in relation to different body positions. Journal of Sports Science & Medicine, 9. pp. 176-182. ISSN 1303-2968
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Abstract
The purpose of this study was to assess the effect of three different body positions on HRV measures following short-term submaximal exercise. Thirty young healthy males performed submaximal cycling for five minutes on three different occasions. Measures of HRV were obtained from 5-min R to R wave intervals before the exercise (baseline) and during the last five minutes of a 15 min recovery (post-exercise) in three different body positions (seated, supine, supine with elevated legs). Measures of the mean RR normal-to-normal intervals (RRNN), the standard deviation of normal-to-normal intervals (SDNN), the root mean square of successive differences (RMSSD) and the low-frequency (LF) and the high-frequency (HF) spectral power were analyzed. Post-exercise RRNN, RMSSD were significantly higher in the two supine positions (p < 0.01) compared with seated body position. Post-exercise ln LF was significantly lower in the supine position with elevated legs than in the seated body position (p < 0.05). No significant difference was found among the three different body positions for postexercise ln HF (p > 0.05). Post-exercise time domain measures of HRV (RRNN, SDNN, RMSSD) were significantly lower compared with baseline values (p < 0.01) regardless body position. Post-exercise ln LF and ln HF in all three positions remained significantly reduced during recovery compared to baseline values (p < 0.01). The present study suggests that 15 minutes following short-term submaximal exercise most of the time and frequency domain HRV measures have not returned to pre-exercise values. Modifications in autonomic cardiac regulation induced by body posture present at rest remained after exercise, but the post-exercise differences among the three positions did not resemble the ones established at rest
Item Type: | Article |
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Members: | Bucks New University |
Depositing User: | ULCC Admin |
Date Deposited: | 31 Jul 2012 12:41 |
Last Modified: | 13 Dec 2016 10:20 |
URI: | http://collections.crest.ac.uk/id/eprint/9694 |
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