Hi Karen, I just saw your post from 4 years ago...so I replied right away! Keep running and I'll see you on the road.

thank you

my shin is very weak from years of skateboarding :3

I'm curious about my previous comment. Have you got it?

Hi Mr Steven, i'd like to ask a question about an important situation. When i do neck extension as you instruct, it develops a hard nausea. But it doesn't occur when doing flexions. Similarly, when i do back extension exercise at gym, with the 45 degree extension bench, i have strong low back pain. Not a pain exactly but a disturbing feeling that area gets hard as a wood block! It gets disturbingly toned and it lasts at least 15 minutes...does these make a sense to you? Do you have a diagnosis

thank you :)

great vid

I've always wondered about how to work the muscle infront of the shin and now I know why. Thank you very much Dr. Smith. Do you have any techniques on how to strengthen the joints for high impact exercises?