No, dad blame it.

If the planet had comparable density to earth (densest of the planets in our solar system), then even though the mass of the planet is greater, the radius at the surface is greater as well (about 1.65 the radius of earth). So the gravity at the surface would only be about 1.65 times greater, not 4.5 times greater.

Still an awful lot for someone to deal with.

But if the density of this new planet were more like the density of Mars (.71 the density of earth), then the radius of the planet is even larger - it ends up with a radius about 1.85 times that of earth, and a surface gravity of about 1.3 the gravity at Earth's surface.

Long term, this would probably be very bad for folks' circulatory systems and joints. But it ought to be survivable for a visit at least.

While I agree that you'd weight more, it probably wouldn't be 4.5 times as much.

If the planet had similar density to Earth (the densest planet in our system), then the planet would be 4.5 times as massive, and its radius at the surface would be 1.65 times that of earth. This results in surface gravity being about 1.65 times that of Earth's surface gravity. That's still an awful lot to deal with, but not nearly as inconceivable as 4.5 Earth weight.

And if the planet has a density closer to Mars' density (about .71 of Earth's density), then the planet ends up being even larger (volumetrically). It ends up with a radius of about 1.85 of Earth, and a surface gravity of about 1.32 Earth G's.

While that wouldn't be good in the long term, I'd guess (for the heart and circulation), it's probably survivable for quite some time for someone in good shape otherwise. (Joints and muscles would be subject to the same loads as being 32% overweight.)

Sorry for the multiple post - my system swallowed the first one with an error and I didn't realize it went through.