Bicycle Confinement Laboratory

NASA and Roscosmos took the concept further. The Mir space station had a stationary bicycle; scientists wanted to replicate that environment on Earth. The "Bicycle Confinement Laboratory" became the standard tool for studying —where subjects lie in a head-down tilt for months. The bike provided the only resistance to muscle wasting.

This one was psychological. I covered the windows with black plastic. No outside light. No clock. Just the trainer, a tablet showing a looped POV video of a flat Dutch countryside, and a fan blowing air that smelled faintly of grass (essential oil diffuser, don’t judge). Bicycle Confinement Laboratory

A cyclist seals themselves inside a 12x12 foot chamber. They begin pedaling at 200 watts (a moderate commute pace). The Danger: As they pedal, they exhale CO2. Without fresh air, the CO2 concentration rises from 400 ppm (normal) to 5,000 ppm (headache territory) to 40,000 ppm (unconsciousness within 30 minutes). The Discovery: This setup tests scrubber technology . For submarine or Mars rover crews, the Bicycle Confinement Laboratory reveals exactly how much CO2 a human produces per hour of work (roughly 40 liters). It answers the question: How many cyclists can fit in a Mars habitat before the air turns lethal? NASA and Roscosmos took the concept further