I've chopped and changed and through a bit of trial and error have come up with an idea that seems to be working (no new zits).

What I do is run/jog for exactly 10 minutes just before I eat a meal. So it equates to half an hour of jogging per day but seems much easier to stick to when you break it up in smaller intervals and reward yourself with a meal straight after. From my experiences through said trial and error and discovered walking is not good enough, it's gotta be jogging. I'd like it if more people can join in and help me find out if this really is the answer. I'm pretty excited about it. Try it before you make up some excuse about how sweating gives you acne or whatever. Try first. It's working for me but is still early days so I don't want to get my hopes up 100% until i know for sure after a month or so.