부산대학교 도서관

Purpose This study aimed to compare haemodynamic, rating of perceived exertion and blood lactate responses during resistance exercise with blood flow restriction ( BFR) compared with traditional high-intensity resistance exercise in hypertensive older women. Methods Eighteen hypertensive women (age = 67·0 ± 1·7 years.) undertook three random sessions: (i) three sets; 10 repetitions; 20% of one repetition maximum (1 RM) with BFR; (ii) three sets; 10 repetitions; 65% of 1 RM; without BFR; and (iii) no-exercise with BFR. The exercise sessions were performed on knee extension equipment. Results Systolic ( SBP) and diastolic blood pressure ( DBP), heart rate ( HR), stroke volume ( SV) and cardiac output ( CO) were significantly higher ( P<0·05) in all sets of exercise sessions than the control. No statistically significant differences were detected between exercise sessions. However, SBP, DBP and systemic vascular resistance were higher ( P<0·05) and SV and CO were lower ( P<0·05) during the rest intervals in the session with BFR. The perceived exertion was significantly higher ( P<0·01) in the 1st (4·8 ± 0·4 versus 3·1 ± 0·3), 2nd (7·3 ± 0·4 versus 5·7 ± 0·4) and 3rd sets (8·6 ± 0·5 versus 7·5 ± 0·4) of the traditional high-intensity resistance exercise compared with the exercise with BFR. Blood lactate was higher ( P<0·05) in the traditional high-intensity resistance exercise (6·2 ± 0·7 mmol) than in the exercise with BFR (4·5 ± 0·4 mmol). Conclusion In comparison with high-intensity resistance exercise, low-intensity resistance exercise with BFR can elicit: (i) same haemodynamic values during exercise; (ii) lower rating of perceived exertion; (iii) lower blood lactate; (iv) higher haemodynamic demand during the rest intervals. [ABSTRACT FROM AUTHOR]