Maybe I'm not understanding but are you saying that the Kj represents calories burned? Based on every other source I've ever seen, this is really low. FWIW, when my Garmin Edge data is uploaded to Strava the elevation data is way off from other rider's devices and sites like www.ridingwithgps, etc. My Garmin will show 2300 ft. of climbing when everyone else has 2800 ft. or thereabouts.