title: Continuous blood pressure response at different intensities in leg press exercise.
abstract: 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.
  
  
  METHODS
  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.
authors.affiliation: Graduation Program Interunities - Bioengineering, EESC/FMRP/IQSC, USP, São Carlos, São Paulo, Brazil nunosfrade@gmail.com.
authors.forename: Nuno M F
authors.initials: NM
authors.lastname: de Sousa
authors.affiliation: Graduation Program Interunities - Bioengineering, EESC/FMRP/IQSC, USP, São Carlos, São Paulo, Brazil.
authors.forename: Rodrigo F
authors.initials: RF
authors.lastname: Magosso
authors.affiliation: Federal University of Health Sciences, Porto Alegre, Brazil.
authors.forename: Thiago
authors.initials: T
authors.lastname: Dipp
authors.affiliation: Federal University of Health Sciences, Porto Alegre, Brazil.
authors.forename: Rodrigo D M
authors.initials: RD
authors.lastname: Plentz
authors.affiliation: Biomechanics Laboratory, Brazilian Army Research Institute of Physical Fitness, Rio de Janeiro, Brazil.
authors.forename: Runer A
authors.initials: RA
authors.lastname: Marson
authors.affiliation: Graduation Program Interunities - Bioengineering, EESC/FMRP/IQSC, USP, São Carlos, São Paulo, Brazil.
authors.forename: Arlindo N
authors.initials: AN
authors.lastname: Montagnolli
authors.affiliation: University of Coimbra, Coimbra, Portugal.
authors.forename: Raul A S
authors.initials: RA
authors.lastname: Martins
authors.affiliation: Federal University of São Carlos, São Paulo, Brazil.
authors.forename: Sérgio E A
authors.initials: SE
authors.lastname: Perez
authors.affiliation: Graduation Program Interunities - Bioengineering, EESC/FMRP/IQSC, USP, São Carlos, São Paulo, Brazil.
authors.forename: Vilmar
authors.initials: V
authors.lastname: Baldissera
mesh_terms: 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 / Q000098:blood supply*; D017156:Photoplethysmography; D055070:Resistance Training; D013997:Time Factors; D055815:Young Adult
keywords: Diastolic blood pressure; finapres; photoplethysmographic; resistance exercise; systolic blood pressure