Age Grading & Body weight considerations

So Finlay has issued the Challenge 40. Run a 10km road race with your target time in minutes being your age...

There's been chat of a wee caveat to entice the rugby boys, which is that if you can bench press twice your final time, then you're ok.

That's maybe a wee bit unfair on the shorter, fat chap (me!) so I'm proposing that he introduces actual body weight into that equation to even things up.

Bench press = (Race time / Age) * Body weight.

So an 85 kg chap running in 40 minutes should bench press 85kg, but if he runs in 45 mins, he needs to bench press 95.625kg.

The gist of it is there are 2 aims here... Run 10k as fast as you can and lose as much weight as you can, but there's no real hiding place!

Anyway, speaking of the Challenge 40 - seemingly arbitrary time limit, I thought I'd do a wee bit research. There's a method used by many running clubs to grade people using the age of the runner and the approximate world record level for a runner that age.

There's a link here but to put things into persepective - a word I'm coming around to hating! - A 40 year old running a 10km race in 40 minutes gets an age graded score of 71.02% - which is actually a Regional class time. The world record for a 40 year old would be 28:25

EXPLANATION
Your age-graded score is the ratio of the approximate world-record time for your age and gender divided by your actual time.

Age-graded scores have been categorized into these broad achievement levels:
100% = Approximate World Record Level
Over 90% = World Class
Over 80% = National Class
Over 70% = Regional Class
Over 60% = Local Class

To score 100% you would need a time of:

Your age-graded time is your finish time adjusted to that of an open division participant using a factor for age and gender. Thus, the times for women and older participants are adjusted downward, while the times for most open division participants (such as 25-year-old men) remain the same.

Look, noone said it was an easy challenge!