If you don&#x27;t lift much, it is kind of hard to describe, but there is this feeling after lifting heavy shit that is just a total peace with the world.<p>Could have something to do with the hormones and neurotransmitters that the body gets flooded with after lifting, could just be light-headed, could be something to do with all the tiny muscle tears...not entirely sure.<p>On the flip side, I&#x27;m a bigger guy(6&#x27;5&quot;), and I just feel beat down and ache for days if I do any substantial distance running.<p>Sprinting though, seems to have similar physiological symptoms as lifting, and I believe several studies have shown that intensity rather than duration of exercise produces these effects.