Did the first 5 runs without a bother. Careful to stretch and warm down. Was really enjoying the programme. Run 6 my Achilles started to hurt (its an old injury) and I haven't run for 10 days now. I bought expensive new shoes in the meantime and kinesiology tape so hopefully when I get started again it will stay away. Very disappointing. Miserable to be old (56) and prone to injury (even more). Hope to get started again in June after my holiday.