Acute Effect of Resistance Training with and Without Blood Flow Restriction On Cardiovascular Variables and Blood Oxygen Saturation in Adults Men
DOI:
https://doi.org/10.37497/colloquium.v1i1.6Keywords:
Strength training, Vascular occlusion, Hemodynamic variables, Blood oxygenationAbstract
Resistance training (RT) with blood flow restriction (RT-BFR) has been proposed as an alternative method to high-intensity resistance training (HI-RT). Studies have been shown that neuromuscular adaptations between both RT-BFR and HI-RT are similar and higher than low-load resistance training (LL-RT). However, cardiovascular and blood oxygen saturation responses from both training models have been few investigated. Twenty-three resistance-trained men (29,1 ± 9,0 years; 79, ± 14,2 kg; 1,75 ± 0,1 m) underwent four RT protocols in unilateral elbow flexion and extension exercise as follow: 20% de 1 RM+40 of arterial occlusion pressure [AOP] (20/40), 20% de 1 RM+80 of AOP (20/80), 20% de 1 RM+120% of AOP (20/120%) and 70% de 1 RM (70/0). BFR protocols were performed with 3-4 sets of 15 repetitions, with BFR being kept during exercise and rest intervals between sets. 70/0 protocol was performed with the same number of sets, however, with 8-10 repetitions. 60s-interval was given in the BFR protocols, whereas 90s was obtained for 70/0 protocol. Sistolic blood pressure (SBP), diastolic blood pressure (DBP), mean arterial pressure (MAP), double product (DP) and blood oxygen saturation (SpO2) were measured pre and post-exercise. SBP and MAP were increased from pre to post-exercise in 20/120 and 70/0 conditions (p<0.05). DBP was increased only in 20/120 condition (p=0.000). DP was increased in 70/0 condition (p=0,03). There was no change in SpO2 in any conditions post-exercise (p>0.05). We conclude that the use of RT-BFR with supra-systolic blood flow restriction and HI-RT training induces greater cardiovascular stress without changes in the blood oxygen saturation levels.
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