Arterial hypotensive profile of hypertensive individuals submitted to resistance exercises with vascular occlusion

Abstract

Objective: The purposes of this study were 1) to analyze the hemodynamic responses of different methods of strength training (vascular occlusion vs. tradicional) hypertensive subjects of middle age, 2) To identify the applicability of the vascular occlusion method and to control risks during training and 3) To demonstrate the effect of strength training with vascular occlusion as an auxiliary training method in the regulation of blood pressure in hypertensive subjects. Methods: Ten men(n=10) of middle age (age: 44,9±5,1 years, body mass: 83,7±12,6 Kg, height: 174,1±8,1 cm, BMI: 27,7±2,3 Kg/m²). The study has the characteristic of a clinical
trial with stratified probabilistic sampling in two intervention protocols. The subjects performed two protocols of strength training. a) Blood Flow restriction (BFR) with 30% 1RM and Tradicional (T) with 70% 1RM. All subjects performed three sets until the concentric
failure in the leg press 45° exercise and the interval between the series was 60 seconds. Hemodynamic variables (systolic blood pressure, diastolic blood pressure and heart rate) were monitored immediately after exercise and every 10 minutes for 60 minutes.
Mean arterial pressure was calculated using formula MBP= SBP+(DBP*2)/3. All subjects were encouraged not to perform the Valsava maneuver. Results: Both protocols showed a significant reduction of SBP, DBP, MBP and HR at 10 ', 20', 30 ', 40', 50 'and 60' when
compared to values immediately post exercise (p<0.05). However, the BFR group showed a significant reduction of DBP at the 20 th post-exertion time relative to rest (p <0.05). In addition, the DBP effect size revealed a large magnitude of effect at the 20 'and 30' posteffort in the BFR group. Regarding SBP, the great magnitude of the effect was observed at 40 'post-exertion in the OV group. Conclusion: Therefore, we conclude that the BFR protocol proved to be effective as a post-effort arterial hypotensive for large muscle volumes in stage I hypertensive patients, especially over the DBP up to 60 minutes.