Could robust protohumans adapt to high-g worlds better than we might?

Some of our ancestors were more robust than modern humans. Could they adapt to a 2-g world better than we might? Maybe even 3-g?

Over time their bodies could evolve, i.e. only the most robust would survive and reproduce. Perhaps they would become shorter, have heavier bones, a stronger heart and more robust artery function to keep up the blood pressure to their heads.

How long might evolution take? I'm thnking of the time when the Ice Age reduced the human population to thousands living in southern Africa; genetic diversity seemed to be enough at that time.

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Could robust protohumans adapt to high-g worlds better than we might?

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