It takes a lot of self-discipline to go jogging in winter.
在冬天跑步是需要很大的自律力的。
牛津词典
Exercising at home alone requires a tremendous amount of self-discipline.
自己在家锻炼需要很强的自我约束能力。
It's up to your own self-discipline, how much effort you put into study.
2019年6月六级真题（第一套）听力 Section A