After week 3 my calves were really tight. It took a couple of days for them to loosen so I could start week 4. The 5 min run caused them to tighten up again and a week later I still can’t walk properly. I have been massaging them , used a sponge roller, lots of stretching and heat packs. Anyone any idea why this is and what I can do? I so want to get going again.