How do you say get your weight up in spanish?

Answer 1

It needs to be understood that "get [weight] up" is an English idiomatic expression with no direct equivalent in Spanish. In this situation, the Spanish would say, "Put you more weight." which would be understood as "Put [on] [yourself] more weight." with the 'on' and the 'yourself' being implied. It would be said, "Ponte más peso."

Answer 2

Pesar