A DIRECT MEASUREMENT FOR THE VALIDATION AND PREDICTION OF LEG POWER THE WINGATE TEST

Abstract

ITRODUCTION The purpose of the research is to design and modify a measurement system to accurately record and validate human power output during the 30 second Wigate bicycle ergometer test. The prototype system developed in the 1970's (Oded-Bar 1987) used the Monarch Bicycle Ergometer to calculate Power (Watts) using a predicted muscle force from a frictional load applied to a rotating fly wheel. A number of studies have since questioned the validity of the power measurement system (Evans and Quimey 1981, Maud and Shultz 1989). METHOD Wenty subjects completed a maximal 30 second Wingate Test on a modified bicycle ergometer (Quinney, 1981). Power calculations were computed using both the standardized Wingate method and a modified Direct Force Measurement system. A monarch bicycle ergometer was modified using strain gauges for the measurement of direct muscle forces onto the pedals. A light emitting diode system accurately measured the angular displacement of the flywheel and an electric step motor controlled resistance loading. The system was interfaced through an analogue to digital board and the signals processed using data acquisition software. The objective of the test was to compare Power calculations for the standardized predicted Wingate Test (Peak and Average Power) to the Direct Force System utilizing muscular forces at the pedals. Correlation coefficients demonstrated the relationship between the two power measurements. Prediction equations were developed to correct Wingate test results and provide a more accurate Power measure using direct muscular force measures. RESULTS Peak Power correlation between Wmgate and Direct Measures were r = .94. Average Power correlations were r = .94. Prediction equations: Average Power (Direct) = (Wingate Power x 2.0503) - 408.9 Peak Power (Direct) = (Wingate Power x 2.4749) - 572.01 CONCLUSION Direct force measurement provides a more accurate system for the prediction of anaerobic leg power and validation of the Wingate Test. REFERENCES Evans, J. A., Quinney, H. A. 1981. Determination of Resistance Settings for Anaerobic Power Testing. Canadian Journal of Applied Sports Sciences. 6:2, 53-56. Maud, P. J., B. B. Shultz 1989. Norms for the Wmgate Anaerobic Test with Comparison to Another Similar Test. Research Quarterly for Exercise and Sport. Vol. 60, No. 2, 144-151.