Typically max refers to working with weights or some other form of resistance training. When we work against resistance, the recruitment of muscle fibers is type I, then IIa then IIb. Maximal effort suggests that we recruit to the IIb fibers. This is what is necessary for maximal power training. When we train to temporary muscle failure we have recruited into the IIb fibers. You haven’t missed any formula, just work to temporary failure.