cross-training
noun/ˈkrɒs treɪnɪŋ/
/ˈkrɔːs treɪnɪŋ/
[uncountable]- the activity of training in sports other than your main sport in order to make yourself fitter and able to do your main sport better
交叉训练（同时参加多项运动训练提高身体素质，进而提高自己在主项上的竞技水平）