He takes himself as an example. Having gotten regular exercise for 20 years, his emotions are on an even keel, he gets along well with other people, works at high efficiency, and can read for several hours on end without feeling tired.
他以自己為例，規律運動二十年下來，他自認情緒穩定、人際互動良好、工作效率佳，持續專注看書幾小時都不覺得累。