Time to exhaustion, ratings of perceived exertion, heart rate, and fatigue factors, such as serum lactate and creatine kinase levels.

运动至力竭时间，感知体力的评分，心率，疲劳因素，如血清乳酸和肌酸激酶的水平。

They said, yes, walking the course is strenuous physical exercise. The fatigue factor is an important part of golf. And so it would change the fundamental nature of the game to give him the golf cart.

他们说，在球场上行走是一项非常耗费体力的活动，但这项耗费体力的活动是高尔夫运动中重要的组成部分，所以，让马丁使用高尔夫球车会改变这项运动的本质。