Anybody here uses a stationary stamina air-bike?

Anybody here use a stationary stamina air-bike? I'm asking this because i own one for rainy days and although they are good, they exhaust me a lot, i try to do 55 min on them

worldgod

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"The dictatorship of the proletariat is a stubborn struggle, bloody and bloodless, violent and peaceful, military and economic, educational and administrative against the forces and traditions of the old society." -Lenin