Once I started this desk job I noticed how fast I fell out of shape. I never was in "great shape" but now I notice after a flight of stairs I'm breathing hard. I'm not fat, bout 5'11" and 170lbs., but I'm getting soft in the middle. I have Insanity and P90X so which one would be best for me to start back with? I tried the gym, but lost my workout partner and can't get motivated to go by myself. I don't want to run a marathon, but I would like to go run with my little boy outside and not feel like I'm going to pass out!