Speeding sloth, I have to tell you: don't give up but do slow down, if both your knees are hurting, take a few more days until pain is gone, it won't do you any good to run like this. That's exactly what I have done thorough out this program, I began running x3 a week, then when my legs were sore I reduced it to x2 or sometimes even just x1 run a week when required due to soreness, listen to your body, give it a rest, this is all new for our bodies, too fast too soon and you'll have to stop all together, and you'll regret it, I stopped at week 9 of the app as I found that stopping for a minute walk didn't do any good for me, and from then on I just worked by kilometres, did a few 6 km runs , 7 km, 7 km where half the route was going up and the other half down, and then 10k! So much fun! Have you heard of a tape that runners put on their knees?