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The purpose of this study was to identify whether a period of 30 min-exercise in warm water for 17 days affects cardiovascular function in men in middle age.
Fifteen warm water groups (WW, 40°C) and ten neutral water groups (NW, 29°C). Were divided into. They exercised (water head - out walking) 30 minutes per day in WW and NW for 17 consecutive days respectively. Measurements:
echocardiography was performed four times (day 1, day 4, day 11 and day 18) during the study. Heart rate (HR) in WW in day 18 significantly decreased, stroke volume (SV,) and end diastolic volume (EDV) in WW significantly increased in day 4, day 11and day 18. End sistolic volume (ESV), ejection fraction (EF), sistolic blood pressure (SBP) and diastolic blood pressure (DBP) (lid not change in each group. Blood pressure (DBP) did not change in each group. The data suggest that walking in WW reduces resting HR, but increases SV and EDV. Thus, we can conclude that WW affects cardiovascular function in men in middle age.