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In the weightless conditions experienced in orbit, all muscles, including the heart, become weaker and start to waste away.

Pete Conrad on the Skylab exercise bike
"Pete" Conrad on the Skylab exercise bike


The StarChild site is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), within the Astrophysics Science Division (ASD) at NASA/ GSFC.

StarChild Authors: The StarChild Team
StarChild Graphics & Music: Acknowledgments
StarChild Project Leader: Dr. Laura A. Whitlock
Curator: J.D. Myers
Responsible NASA Official: Amber Straughn