
Originally Posted by
Talus
The biggest tips I'd give to people as far as form is concerned is to keep your shoulders and arms relaxed, and with your arm swing, they should be traveling relatively forward and backward as you run, i.e. if you were holding daggers while you were running, which is probably a really bad idea™, you wouldn't be stabbing yourself in the opposite shoulder on each arm's swing forward. That's horribly inefficient, and also results in a torquing motion in your hips, which is just a lot of excess, inefficient energy. The easy way to see it is that your arms shouldn't be crossing the midline of your body on the swing is the easy way to say it.
I saw some other things I'd comment on in the post regarding biology/physiology, and I think people have some misconceptions about a) how muscles actually work and b) what "biology" is and what "physiology" is.