Mars' gravity is 38% of that of Earth's.
Supposing a human born and raised on a Mars colony traveled to earth later in their life, would they be able to survive the increased gravity?
For example, I would weigh 63 pounds on Mars, and would land on Earth weighing 166 pounds.
What physiological effects could be expected? If one could not survive, would it be possible through intensive care?
Some things to consider:
Side effects - for example, would one's bones, due to being much thinner, break easily? Would there be respiratory troubles? I suppose there is only speculation in a lot of this as it's never happened.
Length of time to full recovery. Obviously, given one survives, the body would eventually adjust, bones thicken, etc. What sort of estimate could one give on how long it would take to adjust and become "normal" on this increased gravity?