[second wind] also [second breath] {n.}
1. The easier breathing that follows difficult breathing when one makes a severe physical effort, as in running or swimming./
* /After the first quarter mile, a mile runner usually gets his second wind and can breathe better./* /We climbed with labored breathing for half an hour, but then got our second wind and went up more easily./
2. {informal} The refreshed feeling you get after first becoming tired while doing something and then becoming used to it.
* /Tom became very tired of working at his algebra, but after a while he got his second wind and began to enjoy it./