Astronauts' Caloric Needs Surge in Space Due to Microgravity Challenges

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- Astronauts need 2,500 to 3,800 calories daily in space.
- Increased exercise combats muscle and bone loss in astronauts.
- Space conditions raise energy demands for basic functions.
- Intense workouts of two hours daily increase caloric needs.
- Microgravity disrupts muscle function and bone density.
- Astronauts' basal metabolic rate (BMR) increases in space.
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