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High Intensity Training (HIT) is a training technique popularized in the 1970s by Arthur Jones (Nautilus, MedX) which focuses on brief sessions of extreme intensity (to failure), infrequent, with lots of rest and a high concern with strict form. Some characteristics include extreme intensity, dizziness, falling down, and nausea, which is considered by HIT practitioners to be a good sign of the last rep—during each set after appropriately warming up. 
HIT will target a single body part with a single exercise, and generally a single set of 8 to 12, done to momentary muscular failure, or "putting everything you've got into every set of every exercise; about the only movement not to be done to absolute, utter failure was squats, for the simple reason that getting up 'out of the hole' was dangerous and difficult at best, after having failed with a heavy bar across the shoulders." The general idea of HIT is to take a certain, limited number of exercises and work them to utter failure, and to do so only often enough to stimulate growth but not to exhaust one's recovery ability. 
- ↑ Training Glossary. DaveDraper.com (n.d.). Retrieved on 2008-08-09.
- ↑ Donche, Dan (2008). FF Trainer Certification Guide. USA: Fatal Fitness.
- ↑ Wedan, Steve (n.d.). HIT Training for Bodybuilders. DaveDraper.com. Retrieved on 2008-08-09.
- ↑ High Intensity Training. Wikipedia (n.d.). Retrieved on 2008-08-09.