A man from Bristol's gearing up for a test of endurance this weekend.
Daniel Low's taking on a treadmill challenge on Saturday at Gloucester Road gym, which will see him run for ten hours.
It's all part of his efforts to raise money for Bristol Children's Hospital, where staff have been caring for his niece.
Daniel's told us he's hoping he'll gain even more support for his fundraising campaign in the days to come:
"The support from friends, family and staff at the hospital has been great.
"I've had a lot of donations already through Facebook and other means which has been great.
"Hopefully we can get some more coming in before the challenge on Saturday."
Daniel's told us he's confident the training he's done will help:
"I challenged myself to do 10K every day in October and managed to raise some money for charity then.
"But the most I've done is a half marathon, so I'm going to have to pace myself hour by hour and see how I go."