First off please forgive my incompetance, I am new at this!
I was on a stationary bike in the gym yesterday, a SportArt 5200U as it happens
I clocked 25.00 mins covering 12.2 Km at load 6, 95+ RPM (not that that means anything!) burning 520 calories according to the onscreen calculator.
Converting this to Power means a power output of 1450W for 25 mins - is this any good? More over, is it likely to be at all accurate?