Carlton University

http://www.yourrunning.com/forum-help_your_screaming_achilles_tendons

Achilles problems are the bane of many runners' lives.

Pain in the Achilles can be due to a strain, a tear, or chronic Achilles tendonitis, and likely culprits are a form/gait/muscle imbalance coupled with unhelpful running shoe designs, and/or a change in type or intensity of training. I know my Achilles tendons sometimes scream at me if I start speed work too soon; for other runners it's hill work that will set them off.