This is my 3rd attempt at running this year, all with this app. A bout of the flu and recurring pain in front right thigh has resulted in “resting and recovering.” I admit I am 2 stone overweight and unfit. My pain having gone and having monthly massages and daily stretching for really tight muscles in legs - I tried again this evening. The pain in my calves from the warm up was not good but when I started the 90 second run (snail place) the pain reduced me to tears. Am I in danger of seriously doing damage?