High-Intensity Training rests on a single wager — that one set to failure provides enough stimulus to grow, and that the rest of a high-volume session is recovery cost without extra reward.

Two things have to hold for it. The set has to reach momentary muscular failure, not merely get hard, and the load has to climb over time through progressive overload. Miss either and the stimulus fades.

What HIT does not offer is a promise of pounds or a timeline. It offers a method you can run honestly and read from your own logbook.