Cerebral Blood Flow during Interval and Continuous Exercise in Young and Old Men
Timo Klein1,2, Tom G Bailey1,3, Vera Abeln2
1VasoActive Research Group, School of Health and Sport Sciences, University of the Sunshine Coast, Maroochydore DC, QLD, AUSTRALIA.
Medicine and Science in Sports and Exercise
|February 16, 2019
Summary
Interval exercise effectively increases cerebral blood flow (CBF) velocity in both young and older adults. This exercise type may be a beneficial alternative for older individuals, improving cerebrovascular health.
Area of Science:
- Exercise physiology
- Cerebrovascular function
- Aging research
Background:
- Aging impairs cerebral blood flow (CBF), increasing cerebrovascular disease risk.
- Exercise acutely boosts CBF, but this response diminishes in older adults during continuous activity.
- The impact of interval exercise on CBF in different age groups remains unclear.
Purpose of the Study:
- To compare the effects of continuous versus interval exercise on middle cerebral artery velocity (MCAv) in young and old adults.
- To investigate age-related differences in cerebrovascular responses to different exercise protocols.
- To determine if interval exercise can promote greater CBF increases compared to continuous exercise.
Main Methods:
- Intensity- and work-matched continuous and interval cycling protocols were used.
- Middle cerebral artery velocity (MCAv), end-tidal CO2 (PETCO2), and mean arterial pressure (MAP) were measured.
- 11 young (25 ± 3 yr) and 10 old (69 ± 3 yr) men participated.
Main Results:
- Young adults showed higher MCAv during continuous exercise, unlike older adults.
- Total accumulated MCAv (exercise + recovery) was greater with interval exercise in both age groups.
- Relative increases in MAP were similar between age groups but higher during continuous exercise.
Conclusions:
- Interval exercise may be a superior method for increasing CBF velocity compared to continuous exercise, especially in older adults.
- This finding suggests interval exercise is a viable alternative for enhancing cerebrovascular health in aging populations.
- Older adults may benefit particularly from interval training due to potential difficulties with sustained continuous exercise.
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