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ERIC Number: ED110433
Record Type: RIE
Publication Date: 1975
Pages: 18
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: N/A
The Effects of Training on the Time Components of the Left Ventricle, and Cardiac Time Components: Sedentary versus Active Individuals.
Plowman, Sharon Ann
A review of previous research was completed to determine (a) the response of the cardiac time components of the left ventricle to varying types and intensities of training programs, (b) the probable physiological explanations for these responses, and (c) the significance of the changes which did or did not occur. It was found that, at rest, training caused a lengthening in diastole (13.8 percent), ejection period (4.5 percent), and isovolumetric contraction period (9.2 percent). The electromechanical lag shortened by 3.7 percent. Following a submaximal exercise bout diastole was 23.7 percent longer, ejection period 12.8 percent longer, isovolumetric contraction period 14.7 percent longer, and electromechanical lag unchanged as a result of training. These changes are generally thought to reflect adaptation to stress and shifting autonomic nervous control. (A second article, "Cardiac Time Components: Sedentary versus Active Individuals," is attached. This article discusses research which shows that the differences between active and sedentary males parallel the changes that training programs produce in the left ventricular time components. (Author/RC)
Publication Type: Reports - Research
Education Level: N/A
Audience: N/A
Language: N/A
Sponsor: N/A
Authoring Institution: N/A
Note: Paper presented at the Annual Convention of the American Alliance for Health, Physical Education, and Recreation (Atlantic City, New Jersey, 1975); Best copy available