 You know, so instead of the elevator, if your knees are good, take the steps. That is going to engage you just like a sit-up would. But there's other ways to do it. So have fun, but you got to keep your core strong. The core kind of leads to everything else. And especially as we get older, you know, something that's very important is balance and making sure we can stay upright. And so strong core and getting those sit-ups on a daily basis, they hurt.