2x weight is not something disastrous. It's 2g force. You probably expirienced something near that many times at passenger plane take-off. For few minutes only each time, but it is more than enough to reveal any problems if any. Hardly anybody will even describe this as "unpleasant".
Humans and animals will adapt, only some structures for obvious reasons will have problems as mentioned earlier by 867glow5309reggin.
Also, many people who don't care about themselves have more than 2x normal human weight and don't look suffering from their weight specifically, putting apart health problems, some even claim they are "healthy" and "normal".
2x weight is not something disastrous. It's 2g force. You probably expirienced something near that many times at passenger plane take-off. For few minutes only each time, but it is more than enough to reveal any problems if any. Hardly anybody will even describe this as "unpleasant".
Humans and animals will adapt, only some structures for obvious reasons will have problems as mentioned earlier by 867glow5309reggin.
Also, many people who don't care about themselves have more than 2x normal human weight and don't look suffering from their weight specifically, putting apart health problems, some even claim they are "healthy" and "normal".