Re: Grasping at water straws
I'm afraid it's you that can't read. Going to Mars involves a trip through space, and that is what the links refer to. Let me give a few quotes from your NASA link;
Strange things can happen to the human body when people venture into space -- and the familiar pull of gravity vanishes.
That's the sub-heading. Note "venture into space", "gravity vanishes".
In zero-G, muscles atrophy quickly, because the body perceives it does not need them.
Paragraph 2. Note "zero-G", not martian G.
Within two to three days of weightlessness, astronauts can lose as much as 22 percent of their blood volume as a result of that errant message.
Paragraph 4. Note "weightlessness".
The question is, do such losses matter? Perhaps not if you plan to stay in space forever.
Oh look, we're still talking about space, not Mars.
"You want the crew members to function normally when they come back to Earth ... and not have to lie around for long periods of rehabilitation," he says.
And Earth isn't the only planet that astronauts might visit. One day humans will journey to Mars -- a six-month trip in zero-G before they disembark on a planet with 38% of Earth's gravity. "[We'll have to maintain] those astronauts at a fairly high level of fitness,"
Paragraph 10 or so. Now here we do mention Mars, but notice the context; we're talking about Mars as another gravitied destination for the astronauts, like Earth. The article is talking about maintaining the health of the astronauts while they are in space, so that when they land on a planet, be it Earth or Mars, they are able to function.
The article is absolutely clear that it's talking about health issues resulting from weightlessness while the astronaughts are in space, not effects experienced under Martian gravity, and it's a complete mystery to me how anyone could read it otherwise.