Hi guys,

I'm sorry to report that I'm having to temporarily stop my participation in this challenge.

I have a knee that's showing signs of arthritis, but since losing 23kgs, it's stopped hurting me. I can cycle without any pain at all, so I thought running would be okay too.

Except since I've started running, I've developed a 'clicking' sound in that knee, not just when running but when doing simple things like driving or climbing stairs. It doesn't really hurt but I think I should get it checked out, as I don't want to be doing any damage, especially as the program gets more challenging as the weeks pass. So for now, I'm going to give up running.

I'll still be cycling though, so am not giving up exercise, as such. Just running, for now.

But I'll be sticking around to urge you all on!