Finger blood pressure during leg resistance exercise.
Blood pressure (BP) assessment during resistance exercise can be useful to avoid high BP, reducing cardiovascular risk, especially in hypertensive individuals. However, non-invasive accurate technique for this purpose is not available. The aim of this study was to compare finger photoplethysmographic (FPP) and intra-arterial BP values and responses during resistance exercise. Eight non-medicated hypertensive subjects (5 males, 30-60 years) were evaluated during pre-exercise resting period and during three sets of the knee extension exercise performed at 80% of 1RM until fatigue. BP was measured simultaneously by FPP and intra-arterial methods. Data are mean+/-SD. Systolic BP was significantly higher with FPP than with intra-arterial: at pre-exercise (157+/-13 vs. 152+/-10 mmHg; p<0.01) and the mean (202+/-29 vs. 198+/-26 mmHg; p<0.01), and the maximal (240+/-26 vs. 234+/-16 mmHg; p<0.05) values achieved during exercise. The increase in systolic BP during resistance exercise was similar between FPP and intra-arterial (+73+/-29 vs. +71+/-18 mmHg; p=0.59). Diastolic BP values and increases were lower with FPP. In conclusion, FPP provides similar values of BP increment during resistance exercise than intra-arterial method. However, it overestimates by 2.6+/-6.1% the maximal systolic BP achieved during this mode of exercise and underestimates by 8.8+/-5.8% the maximal diastolic BP.
Gomides
R S
RS
University of Sao Paulo, School of Physical Education and Sport, Sao Paulo, Brazil.
Dias
R M R
RM
Souza
D R
DR
Costa
L A R
LA
Ortega
K C
KC
Mion
D
D
Tinucci
T
T
de Moraes Forjaz
C L
CL
D000328:Adult; D001794:Blood Pressure; D001795:Blood Pressure Determination / Q000379:methods; D005080:Exercise Test / Q000379:methods*; D005260:Female; D005385:Fingers / Q000098:blood supply; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*; D007719:Knee Joint / Q000502:physiology; D008297:Male; D008875:Middle Aged; D017156:Photoplethysmography / Q000379:methods; D055070:Resistance Training / Q000379:methods