High-Intensity training (HIT) was popularized by Arthur Jones, Mike Mentzer, and Dorian Yates. The main idea behind it was that bodybuilders are overtraining and would benefit greatly from a workload drop.
HIT requires the lifter to reduce the working sets to one while increasing the rest between the training days. It was not uncommon to rest 10 days before repeating a workout. The belief behind this practice was that naturals cannot recover as quickly as steroid users and therefore need less volume and more rest.
According to HIT’s rules, the single work set must be taken to complete muscle failure. As a result, the method is extremely stressful on the nervous system. When every set begins with the thought that failure is the end, the mind fatigues quickly.
Yet this is not the main reason why HIT is an ineffective training method for natural bodybuilders. The main problem is that the volume is not enough. When you add the extremely long rest periods, it becomes obvious why the so-called HIT Jedis are failing to report growth.
Six times Mr. Olympia Dorian Yates is known for supporting HIT. And while Yates knows all there is to know about training, his opinion does not mean that HIT is super effective, for the fact that he was not natural. When you use as many drugs as an IFBB pro, everything works. It’s really that simple.
Another big reason why HIT fails is its reliance on machines. Some of the principles are impossible to apply on exercises with free weights.
Truth be told, HIT was just another spin-off designed to milk the unaware natties.
To summarize: The principles behind HIT are very interesting and logical. I have watched many videos of Mike Mentzer because I was intrigued by HIT a few years ago. At the end of the day, however, HIT won’t break the natty chains either. Moreover, it comes with a serious stress on the CNS and an unnecessary downtime, which has a negative impact on your growth, recovery abilities and lifting skills.