Introduction: Maximal exercise test (MET) is recommended for hypertensives before engagement in exercise training1,2. Blood pressure (BP) responses during MET allows to identify subjects with exaggerated BP responses during aerobic exercise1. Nowadays, dynamic resistance exercise (DRE) has also been shown to reduce BP in hypertensives2,3; however, this kind of exercise produces a huge increase in BP during its execution, being important to verify whether BP measured during MET can also identify subjects with exaggerated BP responses during DRE. For that, the first step is to observe if systolic BP (SBP) responses during MET and DRE are correlated. Thus, this was the objective of the present study. Methods: Twenty-eight medicated hypertensive men (52 ± 9 years) underwent a cycle ergometer MET (3-min of 30w warm-up followed by increments of 30W/min to exhaustion). Auscultatory SBP was measured pre-MET and at 30W, 60W, 90W, 120W and peak effort. After at least 48h, the subjects executed a DRE (one leg extension, 3 sets of maximal repetitions at 50% of 1RM and 90s of interval between the sets). Photoplethysmographic SBP was continuously measured and averaged for 3 min pre-DRE. In addition, the peak values of each set (S1, S2 and S3) were also obtained. Pre-exercise values were compared by paired t-test. In addition, Pearson’s correlations and linear regressions were calculated between the absolute values of SBP during MET and the increase in SBP (DeltaSBP = peak – pre-SBP) observed in each set of the DRE. P<0.05 was considered significant. Results: Pre-MET and pre-DRE values were similar (124±14 vs. 126±16, P=0.382). There were no significant correlations between SBP measured at 30W MET and the DeltaSBP obtained for all the sets of DRE (p>0,05). However, as Figure 1 shows, SBP measured at 60W, 90W and 120W presented significant correlations with DeltaSBP of S2 (60WxS2 – r=0.41, p=0.028; 90WxS2 – r=0.47. p=0.011; and 120WxS2 – r=0.54, p=0.002). In addition, peak SBP at MET also correlated significantly with DeltaSBP of S2 and S3 (S2- r=0.69, p<0.000; and S2 – r=0.49, p=0.008). Conclusions and Implications: In treated hypertensive men, SBP measured at submaximal and peak workloads of a MET positively correlate with SBP increase obtained in the second set of a DRE, while peak SBP at MET also correlates with SBP increase obtained at the third set. These results suggest that MET can be used to identify hypertensive men that may present exaggerated SBP responses during DRE.
Future Physiology 2019 (Liverpool, UK) (2019) Proc Physiol Soc 45, PC76
Poster Communications: Correlation between systolic blood pressure responses to maximal exercise test and dynamic resistance exercise in hypertensive men
J. C. Silva de Sousa1, G. Maia1, R. Y. Fecchio1, F. A. Ferreira1, A. Pio de Abreu2, G. V. da Silva2, L. F. Drager2, D. A. Low3, C. Forjaz1
1. Biodynamics of hte Human Body Movement, School of Physical Education and Sport of University of São Paulo, São Paulo, São Paulo, Brazil. 2. Hypertension Unit, Renal Division, Hospital das Clínicas of University of São Paulo, São Paulo, São Paulo, Brazil. 3. Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom.
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Where applicable, experiments conform with Society ethical requirements.