Yiannis Kouros, who could be classified as a legend in the world of Ultrarunning, once explained what he was feeling when he was running.
...During the ultras I come to a point where my body is almost dead. My mind has to take leadership. When it is very hard there is a war going on between the body and the mind. If my body wins, I will have to give up; if my mind wins, I will continue. At that time I feel that I stay outside of my body. It is as if I see my body in front of me; my mind commands and my body follows. This is a very special feeling, which I like very much. . . It is a very beautiful feeling and the only time I experience my personality separate from my body, as two different things.
Yes, I agree, Cal, the description above certainly reminds one of the 4th or even the 5th stages of deep meditation, because it sounds like an OOBE; however, it is hard for me to accept that one can have an OOBE while running. So, with the bliss-level expression, "wining a war" between the body and the "mind," and feeling as if one is outside of the body, then we can certainly see the runner's high as a non-dual experience, which suggests from 2nd to 4th stage. I have read other such accounts from runners which has caused me to believe that running at this level can certainly be a style of meditation practice, so we have to add another position (assana) to the recommended meditation postures (assanas).
As an anthropologist, and knowing that most pre-industrial cultures depended upon pedestrian, and even running, as the primary mode of transportation, then the runner's high has also caused me to believe that there are a number of behaviors in pre-industrial cultures that are likely to have led to a larger number per capita experience of charisms than in post-industrial cultures.
I have a lot of uncertainty about this, personally. I feel the same way about the 1st jhana coming to people going to church and feeling moved. I remember you talked about that in one of the retreat videos with Michael. I remember I could never get those positive self-arising feelings to emerge in me. I was totally in the grip of negative emotions for years. When the joy finally came it was a stark experience. So, I think getting over the fetters and having a self-transformation may be necessities to experience jhana.
Considering that the devout of most mainstream religions have found some inspiration in their belief systems, which have in many cases decreased their addictive behavior (fetters), then I am inclined to accept that devotional behavior of a significant proportion of the devout has led to the first stage of depth in meditation (1st jhana).
In fact we could also look at runners who consistently experience the runner's high, also very probably have reduced addictive behavior (fetters), or otherwise they would not have the discipline to hone their running skills to the level of attaining the runner's high.
I too have experienced runner's high before. It starts off with a fresh burst of energy and suddenly the fatigue from the built-up lactic acid does not burden your mind anymore. They still ache after the run however.
This case history report further supports my premise that the runner's high falls somewhere on the scale of the 8 stages of depth in meditation.
I think it is related to the hormonal feedback system but not entirely... We get rewarded for feeling a certain way. We have dopamine receptors, and literally there is a reward system inside the brain for engaging in non-stressful mental activities. I however, always wonder how a sensation such as happiness can result from simply chemical bonding between molecules. Correlation does not equate causation. There might be some energetic counterpart on a non-physical level.
I happen to agree, but the physical sciences are setup with a foundational premise that if it cannot be measured, then it does not exist; therefore, immaterial phenomena will never be accepted in the sciences, at least until they accept my research, or someone's research that parallels mine.
For example, using the crude example of a spirit possession (seen a few), one can suddenly develop huge strength and be able to throw heavy fully-grown men around. It takes about 3 to 4 people to pin down a person like that. I believe that when this happens, the safety mechanisms (opposing muscle groups) do not engage, and hence the body acts past its safety limits/habits. This is also what happens in some martial art strikes where the practitioner tries to relax as much as possible to reduce opposing movement from the opposite muscle group.
It is also not unheard of that some people suddenly have huge strength during emergencies. I think there was this case where an old woman lifted a whole tree off her child, or something like that.
So in the same way, it could be that the runner's high is something that is similar - It allows the runner to ignore the pain and resistance of the physical body itself. If this is so... then perhaps it might not be the healthiest thing to run like that as it can wear the body down.
It seems to me to be some kind of mental mastery over the physical body. Perhaps sati of the body when running?
All I remember when experiencing runner's high was that there was a wave of bliss that suddenly hit me and I suddenly stopped gasping for air. Just some thoughts...
These are good supporting points that respond to many reported case histories, and a well thought out analysis of what is going on for the person who engages in overcoming the limits of the body.
At one time I worked making orthotics in the podiatry profession in San Francisco, which in the late 70s, when I was doing that work, was a big running center, and most of the orthotics that I made then were for runners. To make orthotics for runners, I would be given a plaster mold of the runner's foot, and their favorite running shoes. Those running shoes were always drenched in blood, which told me that those runners were ruining their feet, and very probably other organ systems, with their running style, which was a kind of addiction to experiencing the runner's high.