Training & Nutrition - KJ to Calories

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Hammonjj
01-24-09, 07:47 PM
I've tried doing a couple of google searches and I've been unable to find a conversion between work(kj) to calories burned. I'm really working hard to maintain my weight through all this training and I want to be sure that I am not eating too many calories.

Thanks
James

arexjay
01-24-09, 08:15 PM
http://www.ausmedia.com.au/convert_kj_to_cal.htm

scroll down
cslone
01-24-09, 08:41 PM
kJ to kCal is ~4.18 to 1.

But if I understand correctly, since humans are only around 20-25% efficient at most on the bike, the kJ to kCal conversion is very close to 1:1. Somebody correct me if I misunderstood though.

ericgu
01-25-09, 08:16 PM
kJ to kCal is ~4.18 to 1.

But if I understand correctly, since humans are only around 20-25% efficient at most on the bike, the kJ to kCal conversion is very close to 1:1. Somebody correct me if I misunderstood though.

cslone is correct. If you have a powermeter that records actual work done, then for most purposes, it's good enough to consider "energy expended doing useful work" equivalent to "food energy burnt".