Have spent the last 3 weeks running shorter distances while on holiday and using my new Vivobarefoot running shoes. The last 3 runs I developed some pain and swelling down the outside of my right heel after running. Ankle was tight when flexed but eased off after I had done some massage and exercises. Does this sound like strain to achilles tendon can anyone tell me? Have been to a keep fit class this morning and worn my ASICS and all seems to be OK although it was a low impact class. I'm wondering if I've overdone the wearing of my Vivobarefoot shoes too soon!