航天飞行对心肌细胞强度无影响

自人类空间探测（space exploration）开启以来，科学家一直在研究微重力对人体的影响。最新研究表明，尽管航天飞行会引发多种生理变化，但心肌细胞的强度并未受到微重力的损害。

Since the dawn of human space exploration, astronauts, scientists, and engineers have examined the short- and long-term effects of microgravity (often mistakenly called zero-gravity) on the human body. This includes the distribution of fluids to the upper body (called “puffy face”), an increase in height from the spine slightly extending, how solar and cosmic radiation impacts humans at the genetic level, and skeletal and muscle loss. However, arguably all these aspects pale in comparison to how the microgravity from spaceflight impacts the heart, and specifically heart muscle cells.