"The Effect of High Intensity Exercise Training Verses Low Intensity Ex" by Teresa L. Spate

Date Approved

1994

Graduate Degree Type

Thesis

Degree Name

Health Sciences (M.H.S.)

Degree Program

Health Professions

First Advisor

Teresa Bacon-Baguley

Second Advisor

Randall E. Keyser

Third Advisor

Brian Curry

Abstract

Exercise training is thought to result in an elevation of high-density lipoprotein (HDL) and the cardioprotective subfraction HDL{dollar}\sb2{dollar}. Twenty-five healthy women (39 {dollar}\pm{dollar} 7.8 yrs; 70 {dollar}\pm{dollar} 14 kg) walked two miles three times per week for 12 weeks to examine the effect of exercise intensity on the HDL profile. The L.I. group (N = 12) walked at 60% of the heart rate reserve (HRR) and the H.I. group (N = 13) walked at 80% HRR both maintaining the prescribed distance and frequency. A 22% increase in total HDL (from 32 {dollar}\pm{dollar} 6 to 39 {dollar}\pm{dollar} 8 mg/dl) and a 35% increase in HDL{dollar}\sb2{dollar} (from 14 {dollar}\pm{dollar} 3 to 19 {dollar}\pm{dollar} 9 mg/dl) was elicited as a result of the walking program (p {dollar}<{dollar}.005). Slight increases in HDL{dollar}\sb3{dollar} were also observed. However, no significant differences in total HDL or HDL{dollar}\sb2{dollar} were observed between the L.I. and H.I. groups. These findings demonstrate an exercise induced enhancement of the cardioprotective mechanism thought to be associated with the HDL{dollar}\sb2{dollar} subfraction. Moreover, it appears that walking at 80% of the HRR offers no advantage over walking at 60% of the HRR in enhancing the HDL profile.

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