3. Stair lunge

• Facing away from the stairs, stand tall with your feet shoulder-distance apart.
• Move your left leg backward to rest on a step.
• Inhale, bend your knees, and lower your body.
• Exhale, extend your legs, and return to a standing position.
• Your front knee should be over the center of your front foot. Don't let the knee bend beyond your toes.
• Repeat for the desired number of repetitions before switching to the right leg.