Sweat (one's) guts out

Translation of "sweat (one's) guts out" into Russian

работать до изнеможения

She sweat her guts out to finish the project on time.

Она работала до изнеможения, чтобы закончить проект вовремя.

To work extremely hard or put in a great deal of effort, often to the point of physical exhaustion.