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@chloejm Right. But if it were measuring input into the machine, you'd expect a similarly hard effort on an assault bike to be about a quarter of the calories. It's not. It's clearly attempting to measure calorie burn, not input

@ramona66 this can't be right, unless the bike is displaying approx 4x the expected burn. Anecdotally, an echo bike shows me about 80% of what I'd get for a similar piece on a c2 erg-which is a fairly accurate measure as compare to vo2 tests.

@reathua9 i believe it was invalidated for not being non-obvious, in that a person reasonably skilled in the art would have known to just combine two other designs from older patents to come up with hers.