Answer
Some anatomical adaptations that would be helpful are the following:
Stronger , larger bones with more minerals in the matrix to withstand higher gravitational forces.
Blood with more erythrocytes and higher hematocrit, Somewhat greater blood volume . Thicker epidermis
and thicker subcutaneous fatty layer to decrease water loss but increase insulation. A stronger heart and
a large arteries with increased diameters may be useful.
Work Step by Step
Physiologically, increased basal metabolic rate and more efficient gas exchange in the lungs would be advantageous adaptations.