limber up
1. To stretch and warm one's muscles, so as to become flexible and loose before some strenuous exercise or activity. Make sure you all limber up before we begin practice. I didn't limber up before my run, and now I've got a terrible cramp in my leg.
2. To stretch and warm up someone else's muscles in such a way. In this usage, a noun or pronoun is used between "limber" and "up" in this usage. The team masseuse limbered us up before we headed out to practice. I need to limber up my legs.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.