mind you i'm the guy criticizing mentzer, but basically hit, high intensity training, claims that you should do 1 set for a muscle until you reach muscular failure. when you're not able to move the weight any further, stop your exercise and move on to the next muscle. muscular failure can include reduction to negatives. what this may express as in a hit bench set is push a heavy weight until you can't push the bar, have the spotter assist, and perform negatives by resisting the weight lowering to your chest and having your spotter assist in the positive. once you can no longer handle the bar, conclude your exercise.
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