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Chris Neville reviews performance statistics with Steven Gerrard

Chris Neville reviews performance statistics with Steven Gerrard

KRAKOW, POLAND – JUNE 12: FA exercise scientist Chris Neville reviews performance statistics with Steven Gerrard (R) as he rides an exercise bike during the England team recovery session at the Stary Hotel on June 12, 2012 in Krakow, Poland. (Photo by Michael Regan – The FA/The FA via Getty Images)

2 total comments on this postSubmit yours
  1. My exercise bike panel records that for 10 kilometre ride on setting ‘6’ (‘8’ is the hardest/highest) taking 20 minutes, that I have expended 228 Joules.

    I would be grateful for some explanation. Could this reading be k Joules or Joules?
    And how many calories would I have used on this ride?

    Most grateful for your assistance.

    Regards

    • Hi Michael, one of our sports scientists has kindly come back with the following, which I hope is helpful.

      The unit must be KJ so it is 228,000 J.
      1 W = 1 J.s-1
      so if it takes 20 minutes (1200 s) to cover the 10k , he is working at an external work rate 190 W (228,000 /1200)
      If he is 20% efficient (this is a typical gross mechanical efficiency figure during cycling), the total metabolic rate (internal + external) will be 190 W * 5 = 950 W
      1 W = 0.01433 kcal.min-1
      so 950 W *0 0.01433 kcal.min-1 * 20 minutes = 272 Kcal expended

      He does add that this is of course an estimate but the number seems plausible.

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