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Astronaut Edward M. (Mike) Fincke, Expedition 9 NASA science officer and flight engineer aboard the International Space Station, juggles fresh fruit in microgravity.
Courtesy of NASA.

What is microgravity? How is it created? And how does it impact astronauts during spaceflight? Gregory Vogt, EdD, provides answers to these and other questions about the near weightless conditions in space.

Author(s): Deanne Erdmann MS
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Human Muscular System

Skeletal Muscle Contraction


Motor Units and Musculoskeletal System

Motor Units and the Musculoskeletal System II

Myosin is the Muscle’s “Motor Protein”

Myosin, the “Motor” Molecule

The Pattern of Skeletal Myosin Heavy Chain (MHC) Isoform Transitions

Why Do Skeletal Muscle Fibers Atrophy During Space Flight?

Skeletal Muscle and Loading State

Absolute and Relative Muscle Weight in Response to Muscle Unloading in Rodents

Human Muscle Response Under Different Conditions of Unloading

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