With the way her legs felt, she wasn't certain she'd be able to make the trip!
Moving makes your legs feel better, but not for long.
"My legs feel good and I want to pick up where we left off."
My legs suddenly felt as if they could work no more.
It was getting hard to move; his legs were cold and felt like lead.
My legs felt as if they were filled with water.
His legs felt like lead one minute and then were fine the next.
Taking one step and then another, his legs felt heavy.
My arms and legs felt as if they were made of stone.
His legs felt like they might go at any moment, but he wouldn't give in to them.