Acute cardiovascular response to unilateral, bilateral, and alternating resistance exercise with blood flow restriction.
Eur J Appl Physiol
; 120(8): 1921-1930, 2020 Aug.
Article
em En
| MEDLINE
| ID: mdl-32588194
ABSTRACT
AIM:
Blood flow restriction (BFR) exercise is a common alternative to traditional high-load resistance exercise used to increase muscle size and strength. Some populations utilizing BFR at a low load may wish to limit their cardiovascular response to exercise. Different contraction patterns may attenuate the cardiovascular response, but this has not been compared using BFR.PURPOSE:
To compare the cardiovascular response to unilateral (UNI), bilateral (BIL), and alternating (ALT) BFR exercise contraction patterns.METHODS:
Twenty healthy participants performed four sets (30 s rest) of knee extensions to failure, using 30% one-repetition maximum, 40% arterial occlusion pressure, and each of the three contraction patterns (on different days, at the same time of day, separated by 2-10 days, randomized). Cardiovascular responses, presented as pre- to post-exercise mean changes (SD), were measured using pulse wave analysis and analyzed with Bayesian RMANOVA.RESULTS:
ALT caused greater changes in aortic systolic [ΔmmHg ALT = 21(8); UNI = 13(11); BIL = 15(8); BF10 = 29.599], diastolic [ΔmmHg ALT = 13(8); UNI = 7(11); BIL = 8(8); BF10 = 5.175], and mean arterial [ΔmmHg ALT = 19(8); UNI = 11(11); BIL = 13(7); BF10 = 48.637] blood pressures. Aortic [ΔmmHg bpm ALT = 4945(2340); UNI = 3294(1408); BIL = 3428 (1461); BF10 = 113.659] and brachial [ΔmmHg bpm ALT = 6134(2761); UNI = 4300(1709); BIL = 4487(1701); BF10 = 31.845] rate pressure products, as well as heart rate [Δbpm ALT = 26(14); UNI = 19(8); BIL = 19(11); BF10 = 5.829] were greatest with ALT. Augmentation index [Δ% UNI = -6(13); BIL = - 7(11); ALT = - 5(16); BF10 = 0.155] and wave reflection magnitude [Δ% UNI = - 5(9); BIL = - 4(7); ALT = - 4(7); BF10 = 0.150] were not different.CONCLUSION:
Those at risk of a cardiovascular event may choose unilateral or bilateral BFR exercise over alternating until further work determines the degree to which it can be tolerated.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Pressão Sanguínea
/
Músculo Esquelético
/
Precondicionamento Isquêmico
/
Treinamento Resistido
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article