Stress test

I've passed three so far. I can walk for miles but I am no runner. The first time my knee started to give out but I had reached the target and all was good. You'll do just fine. If they see something not right it can be fixed before it's too late. tmm
No running for me neither, nor steep incline walking.....With what is screwed up in my back I was told to avoid both like the plague.....