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Training close to failure

Finishing most sets with 0-3 reps in reserve, and the last set of safe lifts to failure

Effort in the gym has a research metric: reps in reserve, or RIR. Zero means no more reps were possible; two means two were left in the tank. Lifters who follow this approach end most working sets between zero and three RIR, then push the final set of a low-risk exercise (machines, cables, isolation work) to outright failure. Why bother, if growth looks much the same whether you stop a rep or two short? Because that failure set is how you learn what close actually feels like. Heavy barbell squats and deadlifts stay short of failure since form breaks down first.

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