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FASCICOLI E ARTICOLI   I PIÙ LETTI   eTOC

ULTIMO FASCICOLOTHE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS

Rivista di Medicina, Traumatologia e Psicologia dello Sport

Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111

Periodicità: Mensile

ISSN 0022-4707

Online ISSN 1827-1928

 

The Journal of Sports Medicine and Physical Fitness 2015 Dicembre;55(12):1571-7

SPORT CARDIOLOGY 

 ORIGINAL ARTICLES

Hemodynamic responses during lower-limb resistance exercise with blood flow restriction in healthy subjects

Poton R., Polito M. D.

Research Group of Cardiovascular Response and Exercise, Londrina State University, Londrina, Parana, PR, Brazil

AIM: The purpose of this study was to compare hemodynamic responses during low-intensity resistance exercise, with (LI-BFR) and without (LI) blood flow restriction, with high-intensity resistance exercise (HI).
METHODS: In a randomized crossover design, 17 healthy subjects performed 3 sets (15 repetitions, 20% 1RM, 45-second rest interval between sets) of 45o bilateral leg press exercises for the LI-BFR and LI protocols; and 3 sets (8 repetitions; 80% 1RM; 1-minute rest interval between sets) for the HI protocol. The BFR was established using two sphygmomanometers (18x90 cm) inflated to partially occlude blood flow to the femoral artery. Systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR), stroke volume (SV), cardiac output (CO) and total peripheral resistance (TPR) were evaluated continuously and noninvasively by beat-to-beat measurements during each protocol.
RESULTS: Significantly smaller values were demonstrated during the LI-BFR session versus the HI session between the first and second sets for SBP; during the first, second and third sets for DBP; during the first set for HR; during the first, second and third sets for SV; during the first set for CO, and during the second set for TPR. Conversely, perceived exertion was significantly higher in the LI-BFR session versus the HI session.
CONCLUSION: The LI-BFR session was associated with significantly reduced cardiovascular responses versus the HI session, but showed higher values of subjective perceived exertion.

lingua: Inglese


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