rozgrzewa się in inglese:

It’s important to warm up before you do exercise.

Players usually warm up before a match starts.

Athletes do stretching exercises to warm up their muscles.

The sprinters walked up and down the track to warm up before the race.

Before every training you must do warm up.

The players ran round the pitch to warm up before the game began.

You must warm up before the match

At the beginning of each class we warm up so we don't injure ourselves.

The captain of the team told us to warm up.

The party was only just starting to warm up as I left.

By the time you jump into cold water, warm up a bit.