My first post here; trying to get back into shape: haven't run for over25 years and started this app 4 weeks ago. Starting with week 3, when I had bought new shoes, I get numbness in left foot after about 18 minutes. Have loosened laces a LOT but still get it. Tried it yesterday with just brisk walking and same thing, just a little less. Wish me luck today as I try it in my oldNrwBalance shoes which are wider. Although I hate to be out $130 sure hope it's the shoes and not my body saying you are now 30 pounds more and you can't do this until you drop the weight!