游泳運動對健康中老年人運動後恢復期心臟代償現象之影響=Effects of Swimming Exercise on Post-Exercise Cardiac Compensation in Healthy Middle-Aged Adults
Journal
大專體育學刊
Journal Volume
14
Journal Issue
2
Pages
239-247
Date Issued
2012
Author(s)
Abstract
Post-exercise cardiac compensation is closely associated with cardiovascular health. Swimming exercise could elicit different post-exercise physiological responses compared to land-based exercise due to the environment and posture differences. The purpose of this study was to examine the effect of swimming exercise at two different intensities on post-exercise cardiac compensation in healthy middle-aged adults. Eight male (50.1 ± 3.1 yr) and 9 female (53.9 ± 2.2 yr) subjects were recruited for this study. Each subject completed an initial graded exercise test to determine individual maximal heart rate (HRmax) followed by a 30-min swimming exercise at low (40% HRR, LE), moderate (70% HRR, ME) intensities, and a sham control (CON) by using counter-balanced design. Hemodynamic variables were obtained at 1, 2, 3, 4, 12, and 24-h after exercise by using a 24-h ambulatory blood pressure monitor. Three-way analysis of variance (ANOVA) was used to assess the differences, main effects and interaction (gender × intensity × time) between controlled variables. We found no significant difference in stroke volume (SV), left ventricular ejection time (LV ejection time) and LV dp/dt Max after LE and ME. However, heart rate was significantly increased one hour after exercise in ME compared to LE (82.2 ± 2.8 vs. 75.8 ± 2.3 beats/ min), and both ME and LE showed higher than CON (66 ± 1.8 beats/min). The main effect on cardiac output was reached significantly higher in both ME (4.6 ± 0.2 L/min) and LE (4.5 ± 0.2 L/min) than CON (4.2 ± 0.2 L/min). Our findings conclude that cardiac compensation was still observed during 4-h recovery after 30-min swimming exercise at 40% HRR as well as 70% HRR without any gender difference.
SDGs
Publisher
中華民國大專院校體育總會 & Ainosco Press
Type
journal article