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About the Flight Analogs / Bed Rest Project

Standard Conditions

Conditions:
  • Environmental: 68 to 76°F and 40 to 60% relative humidity
  • Bed position: 6-degree head-down tilt, continuous for the duration of the study
  • Duration: 60 to 90 days
  • Wake: 0600, light out 2200 hrs (strictly enforced, no napping)
  • Daily vitals:
    • Blood pressure
    • Heart rate
    • Body temperature
    • Respiratory rate
    • Body weight (bed scale)
  • Maintenance of body weight with standardized diet
  • Daily stretching exercises
  • Massage therapy every other day during bed rest
  • Visits from the psychological support team for subject support
  • Daily attending physician visit
  • Daily stool softener
  • Measurement of fluid intake and output
  • Subjects are encouraged to be active in bed, using arms but not legs.
Diet:
  • Standardized diet
  • Baseline caloric intake 35.7 kcal/kg body wt (2500 calories/70 kg subject)
  • Fluid intake of 28.5 mL/kg body wt (2000 mL/70 kg subject)
  • Carbohydrate:fat:protein ratio - 55:30:15
    • Phosphorus - 1400 mg/day
    • Sodium - 2 mmol/kg/day
    • Potassium - 1.3 mmol/kg/day
    • Calcium - 1000 mg/day
  • No caffeine, cocoa, chocolate, tea or herbal beverage
  • Caloric intake adjusted to maintain body weight

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