Hi - I've started to get a sore tendon which is the beginnings of tendonitis (I've had it before ages ago). I think it might be as a result of walking to work in my trainers and doing calf raises - since the marathon these are the only changes I have made to training or life. I thought calf raises strengthened the tendon to avoid tendonitis. I can still run but am reluctant to push it in case it makes it worse. It is stiff in the morning. I dont want to rest fully and I am racing in 3 weeks. Is walking in my trainers (they are old ones that I nolonger run in) bad for me? What should I do? I cant wear heels to walk to work!! adn I've stopped teh calf raises.