Title page for ETD etd-11172012-040247


Type of Document Master's Thesis
Author Hoechstetter, Ronald S.
URN etd-11172012-040247
Title Effect of anthropometric factors on the reproducibility of Doppler echocardiographic measurements during stationary bicycle exercise in healthy males
Degree Master of Science
Department Health and Physical Education
Advisory Committee
Advisor Name Title
Herbert, William G. Committee Chair
Cross, Lawrence H. Committee Member
Sebolt, Don R. Committee Member
Keywords
  • Exercise
Date of Defense 1987-09-09
Availability restricted
Abstract
The effect of selected anthropometric indices on the reproducibility of

continuous wave (CW) Doppler echocardiographic recordings in exercise were

studied in 42 healthy males between 18 and 43 years of age. Each subject was

measured and rank ordered in reference to four anthropometric Indices: sum

of 3 skinfolds (SK); chest girth-waist girth ratio (CW); biacromial width-chest

depth ratio (WD); and peak exercise ventilation—forced vital capacity ratio (VV).

Each subject then performed two maximal bicycle exercise tolerance tests on

nonconsecutive days wherein the CW Doppler variables of peak acceleration

(pKA), peak velocity (pKV) and stroke velocity integral (SVI) were measured

along with heart rate (HR), blood pressure (BP) and respiratory gas analysis

data including oxygen consumption (V02). Statistical analyses were then

conducted to determine if subject groups with high vs. low values on any

anthropometric index differentiated with regard to test—retest reliability

between bicycle exercise test trials. Statistical differences were noted between (

the high and a low groups for each index at the .05 alpha level. Pearson's Product

Moment correlational analyses revealed that across all subjects the

highest test-retest reliability occurred during the moderate intensity of

exercise. The average test-retest correlation coefficients for the high and low

groups within each index are as follows: SKH, = .52, SKL = 62, CWH = .64,

CWL = .60, WDH. = 62,WDL = 58, VVh. = 61, VVL = .67. Inspection of

test-retest correlations between the high vs. low groups for the anthropometric

indicies revealed a trend in the skinfold index. For each dependent measure

at all levels of exercise intensity, the low group exhibited higher correlation

coefficients than the high group except for pKA at the peak level of exercise.

The other three indicies exhibited no such trends. lt was concluded that since The other three indicies exhibited no such trends. lt was concluded that since

the overall correlation coefficients (average = .65) were within the ranges of

those computed for HR. BP and VO2; (average = .50) the test-retest reliability

with the CW Doppler was acceptable; but only during moderate levels of

exercise. It was also determined from the correlation coefficients generated

by the skinfold index data that measures obtained on lean individuals may be

moree reproducible than measures obtained from obese individuals (See Table

2).

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