Effects of 5-day exercise training in elderly subjects on resting left ventricular diastolic function and VO2max.
We evaluated the effects of short-term, high-intensity exercise training and detraining on resting left ventricular diastolic function (LVDF) and maximal aerobic power (VO2max) in 7 sedentary older (age = 68 +/- 4 years) men (n = 5) and women (n = 2). Training consisted of cycling for 60 min with power output set at 70% (Day 1), 80% (Day 2), and 90% (Days 3-5) of the pretraining peak work rate. Detraining consisted of a return to regular exercise habits. LVDF increased 10% in the early (E) flow velocity, decreased 18% in the late (A) flow velocity wave, and decreased 31% in the isovolumic relaxation time. VO2max was increased 12% while plasma volume (PV) increased 10% following training and returned to baseline after detraining. The exercise-induced change in VO2max was directly related to the change in E/A (r = .52) and indirectly related to the change in IVRT (r = -.62). It was concluded that short-term, high-intensity exercise training improves LVDF and is tolerated well in older subjects, and that the calculated changes in PV and aerobic power are similar to those observed previously in a younger population.
Petrella
R J
RJ
Centre For Activity and Ageing, St. Joseph's Centre, London, Ontario.
Cunningham
D A
DA
Paterson
D H
DH
D000368:Aged; D000375:Aging / Q000502:physiology; D001783:Blood Flow Velocity; D003971:Diastole; D018619:Echocardiography, Doppler, Pulsed; D015444:Exercise / Q000502:physiology*; D005260:Female; D005500:Follow-Up Studies; D006352:Heart Ventricles / Q000000981:diagnostic imaging; D006400:Hematocrit; D006454:Hemoglobins / Q000378:metabolism; D006801:Humans; D008297:Male; D013058:Mass Spectrometry; D010100:Oxygen / Q000502:physiology*; D013318:Stroke Volume; D016277:Ventricular Function, Left / Q000502:physiology*
D006454:Hemoglobins; D010100:Oxygen