Yes, it is. If you don't, your legs could crampup while you are in the water.
是的。如果你不做，游泳时你腿可能会抽筋儿。
2
But I wouldn't do it; my hand would crampup long before I caught up with what the speaker was going on about.
但我不会那么做，我还没能抓住讲话人要讲什么，我的手可能已经抽筋了。
3
Massage them until your fingers crampup, listen and don't talk, go with them on an errand they could do alone, write them a poem or love letter like you did when you were falling in love.