Could a human survive 2x gravity?

Humans could survive 2 g (double Earth's gravity) for extended periods, but it would be extremely challenging and potentially harmful long-term. At 2 g, everything would weigh twice as much, including your body. Standing and walking would reuire enormous effort, your cardiovascular system would strain to pump blood against increased weight, and prolonged exposure could lead to bone stress, joint problems, and organ compression. Fighter pilots and astronauts sometimes experience 2-3 g during training, but only briefly. Living permanently at 2 g would likely cause serious health problems over time, though the human body might adapt somewhat through increased muscle and bone density.