Mike Mentzer HIT Training

Maximum muscle growth, putting maximal efforts for maximum results, high intensity, low volume.

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Go for full failure.

It means you cannot do even one rep more no matter what you do.

Reach full muscular failure.
It means you cannot get one more rep no matter what you try and hw hard

Full muscular failure 

Means you cannot get one more rep no matter how much and hard you're trying 