Continuous blood pressure response at different intensities in leg press exercise.
BACKGROUND
Generally, the evaluation of the blood pressure response to resistance exercise has been limited to the evaluation of discontinuous casual blood pressure monitoring, often measured at the end of the exercise.


DESIGN
To continuously evaluate the blood pressure response at different intensities of leg press exercise with the same duration and number of repetitions.


METHODS
Seven normotensive healthy men performed an incremental test on the leg press machine at relative intensities of one repetition maximum (1RM). The blood pressure and heart rate were measured simultaneously to the incremental exercise by a photoplethysmographic method.


RESULTS
The mean ± SD peak values of the heart rate, diastolic blood pressure (DBP) and systolic blood pressure (SBP) were obtained on 70% of 1RM and were 145 ± 20 bpm, 113.1 ± 15.4 mmHg, and 192.4 ± 20.0 mmHg, respectively. The SBP was characterized by a decrease followed by an increase during the sets of exercise. The decrease in the SBP was 12-22 mmHg and took approximately 25 seconds to reach the minimum value before the increase. It was observed for all participants in most of the intensities. The rate of increase in the SBP was not statistically different between the intensities.


CONCLUSIONS
Both duration and intensity of exercise have an impact on the blood pressure response. Above 30% of 1RM, the SBP decreases in approximately 20 seconds and starts to increase until the end of the set of leg press exercise.
['de Sousa|Nuno M F|NM|', 'Magosso|Rodrigo F|RF|', 'Dipp|Thiago|T|', 'Plentz|Rodrigo D M|RD|', 'Marson|Runer A|RA|', 'Montagnolli|Arlindo N|AN|', 'Martins|Raul A S|RA|', 'Perez|Sérgio E A|SE|', 'Baldissera|Vilmar|V|']
D000222:Adaptation, Physiological D000328:Adult D001794:Blood Pressure D005080:Exercise Test D064368:Healthy Volunteers D006339:Heart Rate D006801:Humans D035002:Lower Extremity D008297:Male D009119:Muscle Contraction D018482:Muscle, Skeletal D017156:Photoplethysmography D055070:Resistance Training D013997:Time Factors D055815:Young Adult
resistance exercise photoplethysmographic Diastolic blood pressure systolic blood pressure finapres