Sheesh, he's not interested in a multigenerational evolutionary hypothetical here.

Doesn't anyone read?

Likely humans born in low gravity would develop stronger hearts, lungs and musculature. Bones would likely be thicker as well, if not caused by developing in high G then from healing from constant breakage. (Falling would be very dangerous on a high G planet) Children would learn to walk slower and may be significantly shorter, no one would ride bicycles, planes and off planet trips would be very expensive fuel wise.

Low G humans would likely loose the ability to survive in a normal G environment due to atrophy or, in children born on planet, lack of development but it's doubtfull that they would be rendered unable to survive in their own environment. Children would all ride unicycles but would be very jealous of the off-worlders who could fly pedalcopters. Depending on the lack of gravity low cost compressed air jetpacks may be available and people would not need to worry about falling from (again depending on the gravity) almost any height. Expect to see people safely disembarking from air transportation without needing it to land.

Sheesh, he's not interested in a multigenerational evolutionary hypothetical here.

Doesn't anyone read?

Likely humans born in high gravity would develop stronger hearts, lungs, and musculature. Bones would likely be thicker as well, if not caused by developing in high G then from healing from constant breakage. (Falling would be very dangerous on a high G planet) Children would learn to walk slower and may be significantly shorter, no one would ride bicycles, and planes and off planet trips would be very expensive fuel wise.

Low G humans would likely lose the ability to survive in a normal G environment due to atrophy or, in children born on the planet, lack of development but it's doubtful that they would be rendered unable to survive in their own environment. Children would all ride unicycles but would be very jealous of the off-worlders who could fly pedalcopters. Depending on the lack of gravity low cost compressed air jetpacks may be available and people would not need to worry about falling from (again depending on the gravity) almost any height. Expect to see people safely disembarking from air transportation without needing it to land.