Exercise Keeps Astronaut Hearts in Fighting Shape for the Journey to Mars

Getting a human body to Mars will take a toll on it. NASA and other space agencies have been concerned for years that the 6-9 month travel time to get to the Red Planet could have such a deleterious impact on human anatomy that any crewed mission would fail before it even began. But a new study, co-led by Dr. Benjamin Levine of the University of Texas Southwestern Medical Center and published in the journal Circulation, eases some of that concern by claiming that, given a sufficient exercise reg...