Hi breastman,
I think it was a combination of getting my diet right, and the quality and quantity of exercise.
I started going to a local kickboxing club a few nights a week in December 2010, but I didn't do much about my diet, so I only lost a couple of pounds in December & January (although I did get a stomach bug over xmas, so that probably accounted for some of the weight I lost).
Kickboxing is tough. One of the guys there wore a heart rate monitor which worked out he was burning 1500 calories in a 1 hour session. At first, I could only handle one class a week (it took 6 days for my legs to stop aching). But progressively I got fitter and within a few months I was able to do 4 classes a week.
In February 2011, I signed up for personal training sessions at my gym, and with the advice of my trainer, I improved my diet a bit.
I started doing 3 sessions a week in the gym with my trainer, and doing 3 - 4 kickboxing classes a week.
By April, I'd lost 2 stone, but between april and july I hit a plateau and only lost another couple of pounds.
By this time, I was getting on really well with my trainer - he's a top bloke, so one day when we were training outside the gym (there's a big hill he liked to get me to run up and down), I had a chat with him about my moobs, how frustrated I was that I was doing loads of exercise but not loosing much weight, and that the moobs hadn't changed, and I said that I was thinking about surgery.
He took that as a challenge, so we stepped up the intensity of the sessions, started doing 4 sessions a week, and had a very detailed talk about my diet & portion sizes etc and worked out a meal plan.
Since then, this has been my daily diet:
7am:
2 eggs (scrambled or fried - in a dry pan with no oil)
1 cup black coffee
multivitamin tablet
10.30am
half a skinless grilled chicken breast
half a cup of veg (peas / sweetcorn /brocolli / cauliflower)
1pm
half a skinless grilled chicken breast
half a cup of veg (peas / sweetcorn / brocolli / cauliflower)
3pm
Gym session
5pm
1 bottle lucozade sport light
7pm
kickboxing class
8pm
1 scoop low carb protein shake with water
100g unsalted shelled pistachio nuts (you can buy these in 100g bags in sainsburys - in my local store they're in the home baking section).
10.30pm - go to bed.
The only exception was Friday, when there was no kickboxing class - so instead of the protein shake and nuts, I'd have a steak with peas & brocolli for dinner with 2 glasses red wine.
That was the only alcohol I'd have all week - you can buy those airplane size bottles of wine in sainsburys, which is a serving of 1 glass. They're more expensive per glass than buying a whole bottle, but I found it was a great way to avoid the temptation of having an opened bottle of wine around all week.
So basically there was no carbs, no processed meat, no dairy, and no fruit.
No fish either - but only because I don't like fish.
I actually found the diet really easy to stick to - I was never tempted to snack, and I always planned ahead to make sure I never missed a meal and got hungry (which is when I make bad decisions).
And, the more I exercised, the less I found myself craving certain things - quite often I used to come home from work and have a strong craving for pasta & cheese, or sausages etc. Instead, I just got a generic feeling of being hungry, and that would go away as soon as I ate something.
Also, I made sure I was drinking loads of water - I'd usually drink 6 or 7 litres a day (3 litres of that was during, or just after the gym & kickboxing sessions).
Between July and November, I lost another 4 stone - with most of that happening in September and October.
So my total weight loss between December 2010 & Nov 2011 was just over 6 stone.
My BF% in February 2011 was about 40%, and just before surgery it was 16%.
I lost another stone in the month after surgery, which I think was mostly muscle loss from not exercising, because I put it back on the month after that without much change in my BF% - which is now about 13%.
Hope this helps.