Having just spoken about many of the effects that long, slow distance (LSD) cardio has on the body, I wanted to take one more post to elaborate upon those points and touch on a few more. We know that whenever we do any activity, force enters the body. If the muscles absorb that force, then it does not get into the joints and we do not have pain. If, however, the muscles do not absorb that force, it then gets into the tendons and ligaments. This force causes damage, and leads to inflammation within the body.
As one fatigues during LSD, the muscles shorten. A shorter muscle absorbs less force, allowing more to get into the tendons and ligaments; this is why we emphasize training eccentrically. But even more fundamental is the question of training velocity. From discussions with one of our mentors, Dr. John Pietila (Dr. J), we have come to believe that muscles absorb force best when working at or near maximal velocity. Therefore, even before fatigue sets in during LSD, the muscles will only absorb a fraction of the force that enters the body. Some of it will then be diverted to the joints with each stride. The result of this process is a continual low-level inflammatory response, which is the physical reason for "overtraining." Inflammation actually causes further damage to these tissues, decreasing their health over the long term.
Turning on sub-maximally during LSD also causes the body to forget how to turn the muscles on maximally, in the right order, and for the right amount of time. The resulting abnormal movement pattern then causes more low grade inflammation, more abnormal change in the nervous system, more inflammation, more change of the nervous system.
In addition, LSD will not create a sufficient amount of correct feedback into the nervous system to stimulate a change toward health. The nervous system is an intricately-connected web, and its function depends on the feedback that it receives from other areas of the body. This lack of feedback is the major reason that paralysis often shortens the lives of those with spinal cord injuries.
As Dr. J is fond of telling us, insufficient input leads to insufficient output. Proper stimulation is required for all of the body's organs to work properly. This is the reason that people doing the Ultrafit program often find they have more frequent bowel movements: the correct stimulation heightens the function of their organs, so that the organs process metabolic waste more efficiently. On the continuum of life, one can only move towards death or towards health. Since these LSD processes are not creating a more healthy individual, they must be accelerating the processes of aging and death.
Hello, I just wanted to ask a question that is a little off topic but still relevant. I have been told before that in ultra fit training there is no stretching, correct me if I am misinformed but the reason I was told you do not stretch is because muscle physically cannot be stretched. I have mentioned this to a few athletic trainers and they all laughed at me when I said this to them. So basically I was wondering why a muscle cannot be stretched, yet most trainers’ claim it can be?
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