运动运动 means doing physical exercise.'
爬楼 means climbing up the stairs.'
会游泳 means one can swim.
游游泳means going to swim.
游一会泳 means going to swim for a time.
参加比赛 means taking part in a game.
丢了means you lost something like in the sentence '我把手表弄丢了。’or you miss the way like in the sentence '我走丢了。‘
丢在 means put something somewhere or go away from somebody. For example, '我把心丢在云里' ， 丢在functioning as a metaphor. 'Joyce把Lee丢在一边，只管做自己的事儿。'
Hope that helps!