'...brain and body are fundamentally intertwined, and to understand what defines your limits under any particular set of circumstances, you have to consider the

'...brain and body are fundamentally intertwined, and to understand what defines your limits under any particular set of circumstances, you have to consider them both together'. The 'considering' is at the foundations of many mystical and meditative traditions going back thousands of years. Separately, for years when I ran I would time myself and stress about going faster over the same route, and enter races for the medal, t shirt and ranking amongst finishers. I realized that was not a useful way to get the most out of running and that I should try to make it a far more meditative, relaxing experience, and was surprised to find (when I did time myself one day out of curiosity) that I was running at the higher end of the elapsed times I had stressed about previously