F-54 Free Communication/Poster - Cardiorespiratory Responses to Acute Exercise Friday, June 2, 2017, 1: 00 PM - 6: 00 PM Room: Hall F
Acute Effects of Heated Water Based Exercise on Ambulatory Blood Pressure and Heart Rate Variability in Long Term Treated Elderly Hypertensive Patients
3203 Board #108 June 2 2
00 PM - 3
PURPOSE: Although heated water-based exercise (HEx) training has shown to largely reduce blood pressure (BP) in patients with resistant hypertension, the effect of a single exercise bout on ambulatory BP (ABP) in elderly subjects is unknown. Our purpose was to evaluate the acute effect of HEx versus land-based exercise (LEx) on ABP and heart rate variability (HRV) in long-term treated elderly hypertensive patients.
METHODS: Twelve sedentary elderly hypertensive patients (6 women) aged 60±10 yr, under drug therapy for 15±3 yr, underwent a 30 min of HEx (walking inside the pool), LEx (walking on a treadmill) and nonexercise control session (CON) in random order (2-5 days between interventions). HEx and LEx intensity was set at 11-13 in the 6-20 RPE scale. HRV was analyzed before and after each intervention, and twenty-four hour (24-h) ABP monitoring was performed after each intervention.
RESULTS: There was a tendency toward (P = 0.06) increase in low-frequency (pre = 43±7.3 n.u.; post = 57.9±5.5 n.u.) and decrease in high-frequency (pre = 56.7±7.3 n.u.; post = 42±5.5 n.u.) HRV after LEx, but no changes were observed after HEx and CON. However, 24-h (-6 mmHg), daytime (-6 mmHg) and nighttime (-6 mmHg) systolic ABP were significant lower (P < 0.05) after HEx than after LEx and CON. Although daytime (-3 mmHg) and nighttime (-4 mmHg) diastolic ABP was lower after HEx than after LEx and CON, this reduction was not statistically significant.
CONCLUSIONS: Although there was an improvement in HRV after LEx, 24-h, daytime and nighttime systolic ABP reduced only after HEx. This result suggest that HEx may be superior than LEx to manage BP hypertension in long-term treated elderly hypertensive patients.© 2017 American College of Sports Medicine