User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4003956-20120423163831/@comment-1011548-20120423205627

Yes, low gravity does that to astronauts. Human astronauts who have spent their whole life used to Earth's gravity.

If, on the other hand, 'low' gravity conditions are all your species, and indeed, all life on your planet has ever known, then they would be adapted to them. Muscle atrophy and the other symptoms you listed wouldn't be a problem.