Triathlon and Fitness

Times changed 2/12/11 on suggestion from Jenny Gage's daughter that times were too slow for elite men.
 
Updated figures are in spreadsheet.

For Adam, we find that the amount of calories he burnt was:

Swimming

His speed was on average
$ v = \frac{1500}{1152} m/s = 1.30 m/s = 4.6875 km/h $

So, at this pace he was burning $600 \cdot \frac{4.6875}{4.5} = 625 $ calories per hour.

And since he swam for 19 minutes and 12 seconds, it means that during his entire swimming race he burnt $\frac{1152}{3600} \cdot 625$ = 200 calories.

Cycling

His speed was on average
$ v = \frac{40000}{3873} m/s = 10.327911 m/s = 37.18048 km/h $.

So, at this pace he was burning $900 \cdot \frac{37.18048}{30} = 1115.4144 $ calories per hour.

And since he was cycling for 1 hour 4 minutes and 33 seconds, it means that during his entire cycling race he burnt $\frac{3873}{3600} \cdot 1115.4144 $ = 1200 calories.

Running

His speed was on average

$ v = \frac{10000}{1933} m/s = 5.1733057 m/s = 18.623901 km/h $.

So, at this pace he was burning $1100 \cdot \frac{18.623901}{15} = 1365.7527$ calories per hour.

And since he was running for 32 minutes and 13 seconds, it means that during his entire running race he burnt $\frac{1933}{3600} \cdot 1365.7527$ = 733.3  calories.

So, in total Adam burnt 2133.3 calories throughout his entire triathlon race.

The process is  similar for the three other athletes, so we present the results in the following table: