"Centrifuges." . . "Lower body negative pressure." . . "Space flight." . . "Astronaut performance." . . "Nausea." . . "Orthostatic tolerance." . . "Vertigo." . . "Signs and symptoms." . . . . . . . . . . . "Effect of exercise versus passive acceleration on heart rate in humans"@en . . . . . . . . . . . "Cycle-powered short radius (1.9m) centrifuge effect of exercise versus passive acceleration on heart rate in humans"@en . . . . . . . . . . . . . "Heart rate." . . "Physical exercise." . . "Gravitational fields." . . . .