They're still struggling with their strict diet and no drinking regime, but this week exercise is proving to be the saving grace for our team of dieters.
KEY POINTS:
Kerre Woodham, 43
Oh yeah! Feeling good!
Despite the fact I only started training 2 1/2 weeks ago for today's Taupo half-marathon; despite the fact the Drink Fairy has led me horribly astray and despite the fact I was left wondering if my mojo would ever come back, I ran for two hours straight last Sunday in the pouring rain and I actually loved it.
I pulled up okay - a few stiff and sore muscles but nothing major.
I am confident I'll be able to last the distance in Taupo, which I'll probably still be running as you read this.
Clearly, some residual fitness must remain in your carcass even when you're behaving badly.
It would be a lot easier to run the distance, though, if I was a few kilos lighter and I've sworn off any alcohol until after Taupo. Surely six alcohol-free days will count in my favour?
Tania McKenzie, 35
I am writing this from a kiosk in Marylebone Railway Station in London.
Training here has been hard - it has been hot as it's the height of summer, but it is the pollution that kills your running spirit. I pity those poor athletes in Beijing next week. I had no idea what pollution could do to your state of mind as you drag it into your lungs.
I have also developed an addiction to prawn cocktail flavour chips since arriving in Britain which are so not on my list from nutritionist Libby - but there has to be an upside to the curse of the black bogie (those of you who have lived in London will know what I mean).
Tomorrow morning I am doing the "Seven Parks Run" with my hubby, and I will wave to the Queen as I pass Buckingham Palace on my way down the Mall. Rule Britannia! Now, where did I leave that pork pie?
Kim Savage, 22
Routine can be a great thing, but it's not doing anything to help my eating habits. I've realised there are only so many vegetable stir-fries I can eat before boredom sets in. So I snacked a little here and there, the lowpoint being half a packet of Shrewsburys.
I'm trying not to beat myself up over the junk food. Instead I make sure I'm back to the stir-fry the next day. Whatever I'm eating makes a big difference to how much energy I have to train, so if I don't want to collapse on the pavement after 3km, I need to fuel my body properly.
For someone who would've considered the walk between the fridge and the couch exercise five weeks ago, my running has come along way.
I go every second day, breaking it up with a trip to the gym on the off-days. It's hard work, but the widening gap between me and the waist of my jeans is reward enough.