This forum post is hidden because you have chosen to ignore diabetesMD. Show Details
This forum post is hidden because you have submitted an abuse report against it. Show Details
Effects of Fractionized and Continuous Exercise on 24-h Ambulatory Blood Pressure.
To compare the effects of fractionized aerobic exercise (three 10-min exercise sessions) and continuous exercise (one 30-min exercise session) on 24-hour ambulatory blood pressure (ABP).
Eleven healthy prehypertensive subjects (28.3 ± 8.0 (SD) yr) completed three randomly assigned conditions: 1) three 10-min sessions of aerobic exercise (3×10-min), 2) one continuous 30-min session of aerobic exercise (1×30-min), and 3) a non-exercise control trial (Control). The mode of exercise was walking on a motor-driven treadmill at 75% - 79% of maximum heart rate (HRmax) (60% - 65% VO2peak). Twenty-four hour ABP monitoring was monitored with an automated ABP device (Oscar 2). Linear mixed models were used to compare 24-h ABP responses between trials.
Mean (± SD) 24-h systolic BP was significantly lower during the 3×10-min trial (127 ± 15 mmHg) compared to Control (130 ± 15 mmHg) (P < .001). Although both 3×10-min and 1×30-min reduced SBP compared to Control during daytime/evening (1300 h - 2300 h), only the 3×10-min reduced SBP during nighttime (2300 h - 0800 h; 118 ± 16 mmHg vs. 122 ± 14 mmHg; P = 0.024) and the following morning (0800 h - 1200 h; 127 ± 15 mmHg vs. 131 ± 15 mmHg; P = 0.016). Over 24-h, 26.7% of SBP values during 3×10-min were normal (i.e., <120 mmHg) compared to 18.3% for 1×30-min and 19.4% for control (P < 0.001).
In prehypertensive individuals, fractionized exercise (e.g., three 10-min aerobic exercise sessions spread out evenly throughout the day) reduces 24-h systolic ABP by more than a single 30-min exercise session. Fractionized exercise may be a viable and effective exercise alternative to continuous exercise for cardiovascular risk reduction in this population.
COMMENT: This study adds to the growing literature that even short bouts of exercise are beneficial in lowering cardiovascular risk, in this instance, blood pressure. What is interesting is that the 10-minute three times a day program was more beneficial than the 30-minute once a day program.