Warmup

noun

1. The act of exercising or stretching in preparation for strenuous activity

   "If you don't do your warm-ups properly you have a greater chance of injury."

2. Any act of preparation for a performance

   "Drivers are allowed 5 minutes for warm-up before the race starts."

3. A period of time allocated for performing warm-ups.

   "Keep a sharp eye on the referee during warm-up to check out his mood."