Although the cardiovascular changes associated with dynamic exercise have been investigated, there still remain many unanswered questions with respect to blood pressure following exercise. This study examined the effect of temperature on systolic (SBP), diastolic blood pressure (DBP), heart rate (HR), oxygen consumption $\rm(VO\sb2),$ and skin temperature (Tsk) in 10 healthy, young males (23-28 years of age), during a 60-minute supine post-exercise recovery period. On separate occasions, 20 minutes of treadmill exercise at heart rate of 140 beats per minute, preceded a 60-minute recovery period in a supine position conducted at either $\rm18\sp\circ C,\ 27\sp\circ C,\ or\ 40\sp\circ C.$ Results indicated that mean SBP was significantly more above baseline values at $\rm18\sp\circ C$ than at either $\rm27\sp\circ C\ or\ 40\sp\circ C.$ However, no significant difference in SBP was observed between recovery at $\rm27\sp\circ C\ and\ 40\sp\circ C.$ Also, no significant differences were observed among the three conditions for mean DBP. HR decreased progressively during recovery but remained above baseline values, except at $\rm18\sp\circ C$. No significant differences among recovery conditions were observed for $\rm VO\sb2.$ Mean skin temperatures were significantly different among the three recovery conditions except immediately upon entering the chamber. It was concluded that recovery at $\rm18\sp\circ C$ maintained post-exercise SBP above baseline values while $\rm27\sp\circ C\ and\ 40\sp\circ$C caused a decrease in post-exercise SBP with respect to baseline values. DBP and $\rm VO\sb2$ during recovery were not influenced by temperature. HR decreased gradually post-exercise with the lowest HR observed during cold exposure. Therefore, for the conditions of this experiment temperature had a significant effect on SBP, HR and skin temperature all of which effectively appeared to be associated with peripheral vasodilation/constriction mechanisms.
| Identifer | oai:union.ndltd.org:uottawa.ca/oai:ruor.uottawa.ca:10393/10161 |
| Date | January 1995 |
| Creators | Dottori, Tracy E. |
| Contributors | Jette, M., |
| Publisher | University of Ottawa (Canada) |
| Source Sets | Université d’Ottawa |
| Detected Language | English |
| Type | Thesis |
| Format | 140 p. |
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