What is defined as being fit?

Well I thought I'd post a question as my first blog post, what actually defines being fit?

I played ice hockey for a number of years but I never found myself to be classed as being fit, there were guys on the team who were slim (not skinny) but did not have good stamina. Myself on the other hand had good stamina but I enjoyed my take aways, alcohol and the odd chocolate bar. As such I was a little "tubby" but I didn't see this being a problem.

Move forward 2 years in my life and I've stopped playing hockey for the time being, this is simply due to lack of time, in these 2 years I've had a daughter and my role in work changed so that come Friday nights when training was on I was far too tired to go. I'm now very unfit and struggle to run 2 miles without dying of some mystical illness that seems to clear up after half an hour of being sat on the sofa will a pint of cola and maybe a chocolate bar in hand.

I sat back one day and realised I needed some motivation, firstly the Manchester 10k is coming up and as such this was a good motivation tool, it's a public run and as such I don't want to be "that fat man at the back". The next motivation tool I have had is to race my brother, last year he did it in 50 mins, working that out I have to run faster than 12k an hour! We've put a little money on it to make it a bit more interesting as bragging rights just isn't enough :)

My last point of motivation is together fit before I am 30, that's a good 7 months away but my mrs will constantly remind me I am 30 this year, so my response is going to be yes I'm 30 but with a body of a 20 year old. I write this while sat in a hotel room eating a twix.....