Stand behind a chair (in case you need it to help you balance) with your hands at your sides and your feet roughly hip-width apart. You have the option to cross your right leg over your left, making sure the right and left feet end up side by side.
Keeping your core engaged, exhale and slowly bend forward. Drop your hips back and keep your legs straight. If your legs are crossed, keep just a slight bend in that front knee. Stop when you feel the stretch, even if you aren't fully folded forward.
Hold for 20 seconds. As you slowly return to standing, remember to keep squeezing your abs.
If you crossed your legs, repeat with your legs crossed the opposite way. Do this stretch twice on each side.