Abstract:
This study explored, distances covered during 5, 7, 9 and 12 minutes Run-Walk Tests and their relations to VO max value obtained with Astrand-Ryhming Method whch is a standard measurement frequently used in laboratory test. Regression equations for VO max's estimation of each Run-Walk Test duration, as independent variables, are then developed. The subjects (N=30) were students at Singburi High School with an average age, weight, and height of 16.87+-.82 years. 56.2+-7.93 kilograrms. and 170.2+-5.4 centimeters respectively. The test lasted for five weeks, started with the Astrand-Ryhming method in the first week and followed each week by the 5,7,9 and 12 , ,minutes Run-Walk Tests respectively. Results of each Run-Walk Test were recorded, and the correlation coefficients between VO max and distance covered in each test were calculated using the Pearson Method.Results showed that correlation coefficients between VO max value measured by the Astrand-Ryhming Method and distances covered during the 5, 7, 9 and 12 minutes Run-Walk Tests were .91. .79. .74 and .68 respectively. Furthermore. four regression equations were developed which are : y' = .0488x - 20.694 (whereas x = distance covered during 5 min. Run-Walk Test). y' = .0303x - 7.982 (whereas x = distance covered during 7 min. Run-Walk Test), y' = .0195x + 1.755(whereas x = distance covered during 9 min, Run-Walk Test) and y' = .0157x + 0.216(whereas x = distance covered during 12 min. Run Walk Test). No significant difference in VO max values was found when using the 4 regression equations and comparing with the value measured by the Astrand-Ryhming Method However, the regression equation "y' = .0488x-20.694", which was developed from the 5-minute run-walk test. indicated the highest value of coefficient of determination (.83). It is, therefore, concluded that the distance covered during the 5-minute run-walk test. with the subsequent regression equation provides and estimated value of VO max closest to that measured by the Astrand-Ryhming Method for subjects of the same gender and age in this study.