One of the astronauts stranded on the International Space Station since last June explained in a new interview that she is struggling to remember what it feels like to walk and lie down. Suni Williams made the concerning comments while on a call with students at Needham High School located in Massachusetts on Monday — as she and fellow astronaut Butch Wilmore continued their seemingly never-ending orbit around the Earth.

NASA astronauts Suni Williams and Butch Wilmore completed a spacewalk Thursday while awaiting their delayed return to Earth. Williams set a new spacewalking record for female astronauts during the mission.

President Donald Trump took to social media this week to announce he had directed SpaceX CEO Elon Musk to “go get” two NASA astronauts who have been on a protracted stay at the International Space Station after their Boeing Starliner mission, which launched in June and was expected to last about eight days, ran into multiple technical issues.