Clever idea and implementation! I think from a health standpoint, though, this is a false positive and it is probably better to go for an old fashioned _walk_; or to drop to the floor and do some yoga.

For instance, sitting down too much is in itself detrimental to ones health (whether pedaling or not). E.g. prostate health, posture, etc.

In contrast, a stationary bike or road bike, the rider can stand up and pedal fast, etc. There's a much broader range of motion which make the activity healthy!