Validation of a cardiorespiratory fitness test for men with mental retardation Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/zw12z888r

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  • The purpose of this study was to validate a field test of cardiorespiratory fitness for men with mental retardation. The subjects were 19 healthy men with moderate mental retardation whose mean age was 26 years with a mean IQ of 48. Each subject underwent a maximal treadmill test utilizing a walking protocol after a three phase familiarization process. Each subject also completed a one-mile walk test twice. Descriptive statistics were calculated and a correlation matrix was generated. Moreover, standard multiple regression analysis was conducted to evaluate the relationship between peak V0₂ and the time of the distance walk, as well as the ability of the distance walk to predict peak 1102. An alpha level of .05 was used. The results showed that subjects' mean peak VO₂ value was 40 mlkg⁻¹min⁻¹ or 2.59 1min⁻¹ which is considered a below average fitness level compared to nonretarded men of the same age. However, according to the Rockport Fitness Walking Test manual, 79% of the subjects achieved above,average fitness level in the one-mile walk test compared to non-retarded men. The correlation coefficients between peak VO₂ and the two one-mile walks varied from .78 to .83. When weight, height, age, heart rates of one-mile walks, and their combinations were held constant, the correlations were strengthened. Using multiple correlation analysis the best equation for predicting peak VO₂ was: Peak V0₂= 101.92 2.356(mile 1 time) 0.42(weight). This model accounted for 85% of total variance. The standard error of estimate was 4.06 mlkg⁻¹min⁻¹. The test-retest reliability of the one-mile walk test was very high (R=.97). This finding suggests that the Rockport Fitness Walking Test is a reliable field test for this population. The developed equation can be used to predict the peak VO₂ values. Thus, the one-mile walk test (RFWT) would appear to be a valid and reliable measure of cardiorespiratory fitness of men with moderate mental retardation.
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