Clinical Interventions in Aging (Sep 2015)
Effects of exercise intensity on postexercise hypotension after resistance training session in overweight hypertensive patients
Abstract
Paula Andréa M Cavalcante,1,2 Roberta L Rica,1,2 Alexandre L Evangelista,1,3 Andrey J Serra,3,4 Aylton Figueira Jr,1,2 Francisco Luciano Pontes Jr,5 Lon Kilgore,6 Julien S Baker,6 Danilo S Bocalini1,2 1Translational Physiology Laboratory, 2Postgraduate Program in Physical Education and Aging Science, São Judas Tadeu University (USJT), 3Department of Physical Education, 4Postgraduate Program in Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), 5Department of Gerontology of Arts, Science and Humanities School, São Paulo University, São Paulo, Brazil; 6Institute of Clinical Exercise and Health Science, University of the West of Scotland, Hamilton, Lanarkshire, Scotland Abstract: Among all nonpharmacological treatments, aerobic or resistance training (RT) has been indicated as a significantly important strategy to control hypertension. However, postexercise hypotension responses after intensity alterations in RT are not yet fully understood. The purpose of this study was to compare the outcomes of differing intensities of RT on hypertensive older women. Twenty hypertensive older women participated voluntarily in this study. After a maximum voluntary contraction test (one repetition maximum) and determination of 40% and 80% experimental loads, the protocol (3 sets/90" interset rest) was performed in a single session with the following exercises: leg press, leg extension, leg curl, chest press, elbow flexion, elbow extension, upper back row, and abdominal flexion. Systolic and diastolic blood pressures were evaluated at rest, during exercise peak, and after 5, 10, 15, 30, 45, and 60 minutes of exercise and compared to the control. Both experimental loads were effective (P<0.01) in promoting postexercise systolic hypotension (mmHg) compared to controls, after 30, 45, and 60 minutes, respectively, at 40% (113±2, 112±4, and 110±3 mmHg) and 80% (111±3, 111±4, and 110±4 mmHg). Both procedures promoted hypotension with similar systolic blood pressures (40%: -11%±1.0% and 80%: -13%±0.5%), mean arterial blood pressures (40%: -12%±5.5% and 80%: -12%±3.4%), and rate-pressure products (40%: -15%±2.1% and 80%: -17%±2.4%) compared to control measures (systolic blood pressure: 1%±1%, mean arterial blood pressure: 0.6%±1.5%, rate-pressure product: 0.33%±1.1%). No differences were found in diastolic blood pressure and heart rate measures. In conclusion, hypertensive older women exhibit postexercise hypotension independently of exercise intensity without expressed cardiovascular overload during the session. Keywords: resistive training, postexercise hypotension, aging, hypertension
