title: Hypotensive effects of resistance exercises with blood flow restriction.
abstract: The effects of low-intensity resistance exercise (RE) combined with blood flow restriction (BFR) on blood pressure (BP) are an important factor to be considered because of the acute responses imposed by training. The aim of this study was to compare the hypotensive effect of RE performed with and without BFR in normotensive young subjects. After 1 repetition maximum (1RM) tests, 24 men (21.79 ± 3.21 years; 1.72 ± 0.06 m; 69.49 ± 9.80 kg) performed the following 4 experimental protocols in a randomized order: (a) high-intensity RE at 80% of 1RM (HI), (b) low-intensity RE at 20% of 1RM (LI), (c) low-intensity RE at 20% of 1RM combined with partial BFR (LI + BFR), and (d) control. Analysis of systolic blood pressure (SBP) and diastolic blood pressure (DBP) was conducted over a 60-minute period. The 3 RE protocols resulted in hypotensive SBP (HI = -3.8%, LI = -3.3%, LI + BFR = -5.5%) responses during the 60 minutes (p ≤ 0.05). The LI + BFR protocol promoted hypotensive (-11.5%) responses in DBP during the 60 minutes (p ≤ 0.05), and both the HI and LI + BFR protocols resulted in mean blood pressure (MBP) hypotension between 30 (-7.0%, -7.7%) and 60 minutes (-3.6%, -8.8%), respectively. In conclusion, postexercise hypotension may occur after all 3 exercise protocols with greater reductions in SBP after HI and LI + BFR, in DBP after LI + BFR, and in MBP after HI and LI + BFR protocols.
authors.affiliation: 1Department of Gymnastics, Physical Education Graduate Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; 2Department of Physical Education, Kinanthropometry and Human Development Laboratory, Federal University of Paraíba, João Pessoa, Brazil; 3Department of Physical Education, Associate Graduate Program in Physical Education UPE/UFPB, João Pessoa, Brazil; 4Exercise Physiology Laboratory, Department of Kinesiology, California State University, Fullerton, California; and 5Department of Physical Education, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal.
authors.forename: Gabriel R
authors.initials: GR
authors.lastname: Neto
authors.forename: Maria S C
authors.initials: MS
authors.lastname: Sousa
authors.forename: Pablo B
authors.initials: PB
authors.lastname: Costa
authors.forename: Belmiro F
authors.initials: BF
authors.lastname: Salles
authors.forename: Giovanni S
authors.initials: GS
authors.lastname: Novaes
authors.forename: Jefferson S
authors.initials: JS
authors.lastname: Novaes
mesh_terms: D000293:Adolescent; D000328:Adult; D001794:Blood Pressure; D006801:Humans; D008297:Male; D053580:Muscle Strength; D018482:Muscle, Skeletal / Q000098:blood supply* / Q000502:physiology; D064797:Physical Conditioning, Human / Q000009:adverse effects* / Q000379:methods / Q000502:physiology*; D057774:Post-Exercise Hypotension / Q000503:physiopathology*; D017534:Radial Artery / Q000502:physiology; D012039:Regional Blood Flow / Q000502:physiology; D055070:Resistance Training / Q000009:adverse effects* / Q000379:methods; D016909:Tibial Arteries / Q000502:physiology; D055815:Young Adult