If I wanted to build core strength I'd start with these five chair exercises for abs

Woman sits in a chair in a domestic setting, holding a small blue resistance band above her knees. She is wearing a white long-sleeved top, beige pants and beige trainers.

Sit-ups and the plank are not the only ways to build core strength. As a personal trainer who holds chair workout classes for seniors, I've seen for myself how seated exercises can strengthen the abs and deep core, too.

The best thing about these exercises is that they're suitable for all ages and fitness abilities. Plus, strengthening your core can help protect the lower back, which can be affected by long periods of sitting.