This article discusses the research on the efficacy of exercise as a b
ehavioral intervention for the management of HTN. Aerobic exercise is
widely believed to be associated with improvements in physical and psy
chological functions that are altered by sustained blood pressure (BP)
elevations. However, published results from controlled studies of the
effects of regular exercise have yielded inconsistent results. Genera
lly, cross-sectional studies demonstrate a positive relationship betwe
en exercise and lower BP levels, but many studies are plagued by metho
dological weaknesses. Results from interventional trials are less cons
istent, in part, due to the relatively few studies that have compared
exercise to either pharmacologic therapy or placebo. This review criti
cally examines empirical evidence that exercise may prevent or reduce
HTN, discusses potential mechanisms for the effects of exercise, and s
uggests directions for future research.