Grip a pull-up bar with an overhand grip, shoulder-width apart. Engage your core and stabilize your body. With legs straight, lift them towards the bar by flexing at the hips. Touch the bar with your feet, maintaining leg extension. Slowly lower legs back to the starting position. Repeat.
Maintain a strong grip. Engage your core for leg lift, avoid momentum. Control movements for muscle engagement. Start with bent knees if needed. Keep your spine neutral.