No significant ( p > 0.05) effect was observed for ambulatory BP, arterial stiffness, heart rate variability, vascular function and oxidative stress and inflammatory markers in all three groups. Before and after 12 weeks brachial, central and ambulatory blood pressures (BP), arterial stiffness, heart rate variability, vascular function, oxidative stress and inflammation markers were obtained. Home-based and supervised isometric handgrip training was completed thrice weekly (4 × 2 min at 30% of maximal voluntary contraction, with 1-min rest between bouts, alternating the hands). In this randomized controlled trial, 72 hypertensive individuals (38–79 years old, 70% female) were randomly assigned to three groups: home-based, supervised isometric handgrip training or control groups. The purpose of this study was to compare the effects of supervised and home-based isometric handgrip training on cardiovascular parameters in medicated hypertensives. However, the mechanism(s) underlying these effects in medicated hypertensive patients, as well as the effects from home-based exercise training, is uncertain. Meta-analyses have shown that supervised isometric handgrip training reduces blood pressure in hypertensives.
4Graduate Program in Medicine, Universidade Nove de Julho, São Paulo, Brazil.3Sleep and Heart Laboratory, Pronto Socorro Cardiológico de Pernambuco, University of Pernambuco, Recife, Brazil.2Department of Physical Education, Rural Federal University of Pernambuco, Recife, Brazil.1Graduate Program in Physical Education, University of Pernambuco, Recife, Brazil.We hope that the results of this experiment can be adapted to exercise programs for patients with cardiac disease.Breno Q. Eccentric contractions have less effect on the increase of systolic blood pressure and heart rate than concentric or isometric contractions. Diastolic blood pressure is influenced only by isometric contractions. Findings were as follows concectric contractions had a greater effect on the increase of systolic blood pressure and heart rate than eccentric or isometric contractions. After each exercise, heart rate, systolic and diastolic blood pressure were recorded immediately. Each exercise was selected randomly and applied to each subject 10 times in a 10 second. A N-K table was used for three exercises to right knee extensors. The subjects also performed 10RM on right lower extremity. Heart rate, systolic and diastolic blood pressure were recorded prior to starting exercise. The subjects were sixty healthy male volunteers who had no hypertension or cardiac disease. Exercise types studied were concentric, eccentric and isometric.
The purpose of this study is to determine cardiovascular reponses to concentric, eccentric and isometric exercise applied to the knee extensor muscle group.