Lifting to muscle failure is the only failure that’s acceptable… This means the muscle just cant lift the weight anymore.
-Take your time on the release, or negative portion of the rep. It doesn’t have to be slow, but don’t rush or allow to drop the resistance either.
-The negative part of training is very important, this portion of the rep is when most of the muscle fiber damage occurs. Without damage there is no muscle repair, and in turn no growth.