Sometimes the obvious gets overlooked. Common sense really but we never seem to grasp it. Thank you for reminding me.

Overtraining. yup!!
Improper physical prep. yup!! not enough stretching. I'm too stiff. my chiro and masseuse i see every two weeks always remind me to stretch. for some reason I just can never find the time to do so... No wonder I'm injured often!! Just need to stretch first thing in the morning with gentle warm-up. Hamstring, calves, quads, psoas (sp)