warm up

run until the normal working temperature is reached

• “We warmed up the car for a few minutes”

become more friendly or open

• “She warmed up after we had lunch together”

get warm or warmer

• “The soup warmed slowly on the stove”

cause to do preliminary exercises so as to stretch the muscles

• “The coach warmed up the players before the game”

make one''s body limber or suppler by stretching, as if to prepare for strenuous physical activity

exercising in preparation for strenuous activity