Key result
Aerobic interval exercise reduced 3-hour postexercise systolic blood pressure to 118 mmHg compared to 124 mmHg for control (p<0.001), and was the only modality to sustain hypotension >2 hours.
Why the study?
Do different intensities of exercise (steady-state, aerobic interval, sprint interval) reduce postexercise blood pressure in young adults?
RCT (n=11)
randomly assigned
Do different intensities of exercise (steady-state, aerobic interval, sprint interval) reduce postexercise blood pressure in young adults?
Absolute Event Rate: 118% vs 124%
p-value: p=<0.001
Aerobic interval exercise results in a more sustained reduction in postexercise blood pressure compared to steady-state or sprint interval exercise in young adults.
Aerobic interval exercise sustains postexercise hypotension longer in young adults; extends RCT evidence on modality-specific BP responses.
We examined the effects of 3 exercise bouts, differing markedly in intensity, on postexercise hypotension (PEH). Eleven young adults (age: 24.6 ± 3.7 years) completed 4 randomly assigned experimental conditions: (a) control, (b) 30-minute steady-state exercise (SSE) at 75-80% maximum heart rate (HRmax), (4) aerobic interval exercise (AIE): four 4-minute bouts at 90-95% HRmax, separated by 3 minutes of active recovery, and (d) sprint interval exercise (SIE): six 30-second Wingate sprints, separated by 4 minutes of active recovery. Exercise was performed on a cycle ergometer. Blood pressure (BP) was measured before exercise and every 15-minute postexercise for 3 hours. Linear mixed models were used to compare BP between trials. During the 3-hour postexercise, systolic BP (SBP) was lower (p < 0.001) after AIE (118 ± 10 mm Hg), SSE (121 ± 10 mm Hg), and SIE (121 ± 11 mm Hg) compared with control (124 ± 8 mm Hg). Diastolic BP (DBP) was also lower (p < 0.001) after AIE (66 ± 7 mm Hg), SSE (69 ± 6 mm Hg), and SIE (68 ± 8 mm Hg) compared with control (71 ± 7 mm Hg). Only AIE resulted in sustained (>2 hours) PEH, with SBP (120 ± 9 mm Hg) and DBP (68 ± 7 mm Hg) during the third-hour postexercise being lower (p ≤ 0.05) than control (124 ± 8 and 70 ± 7 mm Hg). Although all exercise bouts produced similar reductions in BP at 1-hour postexercise, the duration of PEH was greatest after AIE.
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Angadi et al. (2015) conducted an RCT in postexercise hypotension (n=11). Aerobic interval exercise, steady-state exercise, and sprint interval exercise vs. Control was evaluated on Systolic blood pressure during the 3-hour postexercise period (p=<0.001). Aerobic interval exercise reduced 3-hour postexercise systolic blood pressure to 118 mmHg compared to 124 mmHg for control (p<0.001), and was the only modality to sustain hypotension >2 hours.
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