I was a runner from 1976-2004 when i was disabled in a traffic accident.
I also coach high school cross-country and track.
if anyone has any questions, feel free.
VitoVino, I'm concerned about your Achilles.
A few questions:
How long have your tendons been hurting?
How high are the heels on your running shoes compared to your street shoes?
Are you stretching?
Are you icing the tendons?
I would recommend you not run until you're pain-free.
If cycling is pain-free, you can do that. Swimming and water running are other options.
"To give anything less than your best is to sacrifice the Gift."