Exercise countermeasure preferences of three male astronauts, a preliminary qualitative study

A single flywheel exercise countermeasure has been chosen for use on-board the Orion Multi-Purpose Crew Vehicle spaceflight missions of up to 30 days. As previous have typically involved multiple countermeasures there is a concern that only may lead boredom and reduce astronaut adherence prescriptions, presenting risk their health operational success mission. To determine if this will be concern, qualitative work identified astronaut-reported considerations implementation an device during spaceflight, current plans affect prescriptions. The responses three male astronauts open-ended survey were analysed using thematic analysis. All participants required currently taking part in, or previously taken human spaceflight. Astronaut preferences categorised into broad themes: ease access, motivational behavioural considerations, technical considerations. considered flywheel-based suitable as sole MPCV, similar capsular spacecraft, so long it met several conditions. should engage in varied prescription. also meet physiological expectations deconditioning. enjoyable use, measures put place (via variety prescription). easy access terms both setup/takedown. Finally, used without other days less. Individual crewmember consideration following crew selection ensure greatest data reported here supplement, not entirely inform, development future countermeasures.