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3 由阻力和摩擦力而产生的能量消耗 与总机械力输出相比较,能精确地计算出在滑雪和滑冰中,由于阻力和摩擦力所造成的运动员能量的消耗。在越野滑雪、滑冰和高山滑降滑雪中,有关的两个因素的重要性在图3中作了介绍(计算方法请看附录A)。 图3a表明由于滑行速度的作用而产生的阻力
3 The energy consumption due to resistance and friction In comparison with the total mechanical output, the energy consumption of athletes due to resistance and friction in skiing and skating can be precisely calculated. The importance of the two factors involved in cross-country skiing, skating and alpine skiing is illustrated in Figure 3 (see Appendix A for calculation). Figure 3a shows the drag due to the effect of taxi speed