Your Mission: Perform the Commander Crunch and Pilot Plank to improve the strength in abdominal and back muscles. Astronauts in space must be able to twist, bend, lift, and carry massive objects. They must have …
Your Mission: Perform the Commander Crunch and Pilot Plank to improve the strength in abdominal and back muscles. Astronauts in space must be able to twist, bend, lift, and carry massive objects. They must have …
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