Training to failure is kind of a controversial topic among modern bodybuilders — there is still an ongoing debate about whether the benefits of reaching muscle failure outweigh the risks it brings. (fitnessandpower.com)
We need to try and select a weight where we'll reach a point of complete muscle failure at 100, not before or after. (anabolicsmall.com)
Do your set until you reach complete muscle failure. (sixstarpro.com)