Tuesday, 6 October 2009

Fat Runner gets another 5k personal best

Personal bests are always a great feeling for a runner - knowing that you've never run faster than before gives you a great sense of achievement, knowing that your hard training is paying off in better performance.

Personal bests also might make you think that you've started a trend, and that your time might continue to drop.

I'm feeling great for both of these reasons, because in the last four weeks of the 5k Wimbledon Common time trial, I've achieved FOUR personal best times!!

  • Previous PB (set on 8th March 2008): 29:14

  • 12th September 2009: 28:30

  • 19th September 2009: 28:16

  • 26th September 2009: 27:52

  • 3rd October 2009: 27:40

As I mentioned in this post about my first 5k personal best, I think that there are five things which are making a difference.

  • I'm lighter - now down to around 93kg - read my Intermittent Fasting story here

  • I'm stronger - from using Turbulence Training

  • I'm getting more mid-week runs in

  • I'm doing more speed work/intervals in my training

  • I'm concentrating a lot on technique

Just as a bit of fun, I've drawn a correlation between my weight and my time - here it is...

5k personal best

And running through Excel's statistical tools lets me know that, if weight is a good predictor of time, then the following equation holds true:

T=-7.8 + 0.38 x W

T = time in minutes
W = weight in kilograms

Therefore, at my target weight of 85 kg (which I think I should hit by the end of November), my 5k time should be around 24:45, which I think will be very respectable...

That would put me at just around half way up (or down) the field at the 5k time trial, and would give me an age-graded performance of 53%.

Apparently, "local class" athletes should have age-graded performances of around 60%, which would mean a 22:06 5k time. Right now, that feels very much out of my grasp, but who knows?

Anyway, while all of this talk of personal best times is very exciting, and the "predictions" are fun, there is a downside... What if I don't achieve another PB next Saturday? It will be the first Saturday in a while that I haven't been able to come back and tell my wife that I've achieved a personal best... She's already said that I should text her on the way back if I don't get a PB so that she can get out of the house...