The pwpose of this study was to identiJY whether a period of 30 min-exercise
in warm water for 17 days affects cardiovascular function in men in middle age.
Fifieen warm water groups (WJ¥, 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 si,5flificantly decreased,
stroke volume (SV) and end diastolic volume (EDV) in WW significantly
increased in day 4, day 11 and day 18. End sistolic volume (ESV), ejection
fraction (EF), sistolic blood pressure (SBP) and diastolic blood pressure (DBP)
did 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.