Momentary Muscular Failure/Fatigue (MMF)

When we are performing a Weight Training exercise, the point that we can no longer lift the weight, no matter how much effort we put forth, is referred to as Momentary Muscular Failure (MMF).

Carrying an exercise to MMF is one way to ensure you have overloaded a muscle, and sent signals to your body that it now needs to grow bigger and stronger to cope with the new stress.