INFO:

NASA astronaut Sunita Williams has broken her silence about fears that her health has deteriorated since becoming stranded on the International Space Station. A 'gaunt' photo of Williams on September 24 sparked concerns about her weight, but the astronaut - who has been stuck on the ISS for 159 days - revealed she weighs the same amount now as she did during the June launch. 'I think things shift around quite a bit, you probably heard of a fluid shift,' Williams said in a live broadcast from the ISS. 'Folks in space you know, their heads look a little bit bigger because the fluid evens out along the body.' Williams, 59, and Barry Wilmore, 61, have been living on the ISS for five months after Boeing's faulty Starliner spacecraft was deemed unsafe to return them to Earth - the mission was initially an eight-day stay. Williams continued to explain that she has been filling her time with exercising, weightlifting and running on the treadmill, which she claimed has actually increased her body size. 'My thighs are a little bit bigger, my butt is a little bit bigger. We do a lot of squats,' she said. Williams noted that physical activity is critical to increasing bone density - astronauts can lose up to two percent of bone density per month in their hips and spine.