- Title
- Immediate re-hydration post-exercise is not coincident with raised mean arterial pressure over a 30-minute observation period
- Creator
- Kay, Bartholomew; O'Brien, Brendan; Gill, Nicholas
- Date
- 2005
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/57053
- Identifier
- vital:467
- Identifier
- ISSN:1303-2968
- Abstract
- This investigation assessed the effects of immediate or delayed re-hydration post-exercise, on mean arterial blood pressure ( MAP) and on blood plasma volume (PV) expansion post-exercise. It was hypothesised that fluid ingestion would raise MAP and attenuate PV expansion. On two occasions separated by seven days, eight males ( age 20.4 +/- 1.7 years, mass 79 +/- 5 kg [ means +/- SD]; VO2 max 48 +/- 11 mL center dot kg(-1) center dot minute(-1), [mean +/- SE]) cycled in the heat (35 degrees C, 50% relative humidity) at a power output associated with 50% VO2 max, until 1.0kg body mass was lost. 1L water was given either immediately thereafter, or two hours post-exercise by random assignment. On both occasions, MAP was calculated every five minutes for a period of 30-minutes post-exercise, and change in PV was calculated 24-hours post-exercise. Repeated measures ANOVA for MAP results suggested a low probability of a treatment effect ( p = 0.655), a high probability of a time effect ( p = 0.006), and a moderately high probability of a time x treatment interaction ( p = 0.076); MAP tended to be lower when fluid had been consumed. PV expansions 24-hours post-exercise were not significant changes with respect to zero, and were not significantly different by treatment condition. In conclusion: ( a) The exercise was not sufficient to elicit significant PV expansions; thus, we were unable to determine the effects of the timing of post-exercise re-hydration on PV expansion. (b) The hypothesis regarding MAP in response to drinking was not supported, rather there was a 92% probability that the inverse affect occurs.; C1
- Publisher
- Assist Group
- Relation
- Journal of Sports Science and Medicine Vol. 4, no. 4 (Dec 2005), p. 422-429
- Rights
- Copyright Journal of Sports Science and Medicine
- Rights
- Open Access
- Rights
- This metadata is freely available under a CCO license
- Subject
- 1106 Human Movement and Sports Science; Dehydration; Re-hydration; Blood; Pressure; Plasma; Volume
- Full Text
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