Abstract: In this paper electric circuit model was developed for experimental approach to study the human endurance to ejection. The human body is considered as an elastic body of single degree of freedom with low damping ratio. Its mechanical motion after the action of ejection force is similar to the current motion in the circuit of an electric oscillator. Their motion can be expressed by the same differential equation. When their natural frequency and damping ratio are the same, the electric oscillatory circuit can be used for experiments instead of human body. Natural frequency of 10.5Hz and damping ratio of 0.3 were selected for the electric model. Having transfered square waves, sine waves, triangle waves, trapezoid waves, discrete waves and overlapping waves into the electric circuit model, the output wave can be obtained. According to the amplitude of the wave, we can get the ratio value of input to output waves. If we know the amplitude of input wave, we can calculate the amplitude of the output wave from the ratio. The value of amplitude of output wave represents the magnitude of ejection overload acting on the human body. If we know the endurance capability to compressive stress of the vertebral bone, we can predicate the human endurance to ejection overload. According to this principle we have plotted the curve of human endurance vs. ejection overload.