RESEARCH REPORT: PDF OnlyComparison of Heart Rates During Water Running In Deep and Shallow Water at the Same Rating of Perceived ExertionRobertson, Julie M.; Brewster, Emilie A.; Factora, Kent I.Author Information Julie M. Robertson, 15068 NW Twoponds Drive, Portland, OR 97229, (503)359-2491 Emilie A. Brewster, Wilsonville, OR Kent I. Factora, Portland, OR Journal of Aquatic Physical Therapy: Fall 2001 - Volume 9 - Issue 1 - p 21-26 Buy Abstract Many rehabilitation clinics offering aquatic therapy have implemented programs consisting of exercise in shallow water conditions. The majority of studies comparing physiological responses of exercise on land to exercise in water have focused on deep water running (DWR) conditions and did not include shallow water running (SWR) in the comparison. Heart rates for shallow water exercise, however, are often prescribed based on the results of DWR studies. The purpose of this study was to compare heart rates during water running at two different levels of immersion at a constant rating of perceived exertion (RPE). Forty-two healthy subjects were tested while running at a RPE of 15 in deep water (immersed to the neck while wearing an AquajoggerTM flotation device) and in shallow water (immersed to the xiphoid process). A paired t-test was performed to assess heart rate (HR) at the two levels of water immersion. The results revealed a significant difference (p=0.0007) of 10 beats·min-1 between the mean HR during SWR (155.8 beats·min-1) and DWR (145.8 beats·min-1). These findings suggest that aquatic professionals should not prescribe shallow water exercise heart rates from values obtained from deep-water exercise. © 2001 by Lippincott Williams & Wilkins, Inc.