It turns out that your mother’s advice can be good for you. Sitting up straight in a chair leads to good posture which helps minimize stress on your muscles and joints. It tuns out this can prevent osteoarthritis or offer pain relief if you have the condition already.
Improving your posture eases the burden on your joints. Try sitting up straight, it’s never too late to start. Sit with your bottom square on the chair, your back against the back of the chair, and your shoulders facing forward. Make sure your feet are flat on the floor, your weight is even on your hips, and your knees are at a comfortable angle. If you place a rolled-up towel or pillow above your waist, it helps you sit up straighter, allowing your shoulders to gently roll backwards. Try this technique in the car too!