h90 Posted December 2, 2014 Share Posted December 2, 2014 I have a kind of bicycle trainer. It shows me the Watt of power (mechanic) and average. Say I was doing 100 Watt for 1 hour so I have 100 Watt hours or 360.000 Joule. How can I calculate the burned Kcalorie. I can of course calculate the Joule to Kcal but that would be wrong because I burn more than it because of the bad efficiency of the body (I guess 30%). Anyone know the formula? Link to comment Share on other sites More sharing options...
Chonburiram Posted December 2, 2014 Share Posted December 2, 2014 (edited) 0,1 kWh = 360.000 J = 85,984 kcal You produce 100 Watt's, the cal's you burn, ??? Edited December 2, 2014 by Chonburiram Link to comment Share on other sites More sharing options...
h90 Posted December 2, 2014 Author Share Posted December 2, 2014 0,1 kWh = 360.000 J = 85,984 kcal You produce 100 Watt's, the cal's you burn, ??? Unbelievable, the manufacturer answered me (I wrote them an email, never believing I get an answer). Here what they told: When someone 10 minutes with a power of 200 watts has been cycled the energy consumption 200 watts = 200 Joules / sec. x 600 sec. (10 min.) = 120,000 Joules = 120 kjoule : 4,18 = 28.7 kcal x 4 = 115 Kcal. The average yield of the human body is 25%. Therefore, the energy consumption is multiplied by 4 so on your calculation the body would have burned 344 kcal (of course just approx. not exactly). Link to comment Share on other sites More sharing options...
Satcommlee Posted December 2, 2014 Share Posted December 2, 2014 Watch you don't burn the light bulb at both ends! Link to comment Share on other sites More sharing options...
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