Acute resistance exercise with blood flow restriction in elderly hypertensive women: haemodynamic, rating of perceived exertion and blood lactate.
OBJECTIVE
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 (1RM) with BFR; (ii) three sets; 10 repetitions; 65% of 1RM; 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).


CONCLUSIONS
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.
Research Group of Cardiovascular Response and Exercise, Londrina State University, Londrina, Paraná, Brazil.
Roberta R
RR
Pinto
Health and Human Performance, University of Texas Rio Grande Valley, Brownsville, TX, USA.
Murat
M
Karabulut
Research Group of Cardiovascular Response and Exercise, Londrina State University, Londrina, Paraná, Brazil.
Roberto
R
Poton
Research Group of Cardiovascular Response and Exercise, Londrina State University, Londrina, Paraná, Brazil.
Marcos D
MD
Polito
D000367:Age Factors; D000368:Aged; D000375:Aging / Q000097:blood; D015415:Biomarkers / Q000097:blood; D018592:Cross-Over Studies; D005260:Female; D006439:Hemodynamics; D006801:Humans; D006973:Hypertension / Q000097:blood / Q000175:diagnosis / Q000503:physiopathology / Q000628:therapy*; D007511:Ischemia; D019344:Lactic Acid / Q000097:blood*; D010465:Perception; D012039:Regional Blood Flow; D055070:Resistance Training / Q000009:adverse effects / Q000379:methods*; D012737:Sex Factors; D013848:Thigh / Q000098:blood supply*; D013997:Time Factors; D016896:Treatment Outcome
D015415:Biomarkers; D019344:Lactic Acid
cardiovascular system; haemodynamic; hypertension; muscle strength; resistance training