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Abstract
OBJECTIVE: To analyze the acute effect of rest interval length on cardiovascular response after resistance exercise. METHODS: Twenty young eutrophic men (23.9 ± 0.7 years;23.8 ± 0.5 kg/m²) performed two experimental sessions in a random order: resistance exercise with a 30-second (I30) and with a 90-second (I90) rest interval between sets. Both sessions included five exercises with 50% of the one-repetition maximum. Before and 24 hours after the experimental sessions, systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR), and rate-pressure product (RPP) were obtained. RESULTS: The SBP, DBP and RPP responses were similar between the I30 and I90 sessions (p>0.05), while the HR after I30 was significantly higher than after I90 (p<0.01) for the first hour after exercise. The cardiovascular responses during the first 24 hours were similar between both sessions (p>0.05). CONCLUSION: Different recovery intervals did not promote post-exercise hypotension, however, a short rest interval increases heart rate for 1 hour after exercise. In addition, within 24 hours of the responses were similar between groups.
Highlights
After a single bout of resistance exercise, blood pressure (BP) decreases to levels lower than in the pre-exercise period, which is known as post-exercise hypotension (FORJAZ et al, 2004; FORJAZ et al, 1998; FORJAZ et al, 2000)
The main findings of this study were the following: a) after resistance exercise with 30 or 90 sec of rest interval between sets, systolic BP did not change while diastolic BP, heart rate, and rate pressure product increased in comparison with pre-exercise levels; b) at the first hour after resistance exercise, heart rate and rate pressure product were higher for the I30 session than the I90 session; c) systolic BP, diastolic BP, heart rate, and rate-pressure product values measured during 24-hour, awake, and asleep periods, as well as the nocturnal fall and morning surge after exercise were similar between the I30 and I90 sessions
Systolic BP did not decrease in comparison with pre-exercise levels after the resistance exercise
Summary
After a single bout of resistance exercise, blood pressure (BP) decreases to levels lower than in the pre-exercise period, which is known as post-exercise hypotension (FORJAZ et al, 2004; FORJAZ et al, 1998; FORJAZ et al, 2000).
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