Hanging oblique knee raise progression

From easiest to hardest. Move to the next step when you can do the current one with good form.

1. Knee/Hip Raise On Parallel Bars · Beginner · reps
   Position your body on the vertical leg raise bench so that your forearms are resting on the pads next to the torso and holding on to the handles. Your arms will be bent at a 90 degree angle.
2. Hanging oblique knee raise · Intermediate · reps
   Hanging from a pull-up bar with straight arms, the knees bend and rise together toward one side of the chest by twisting the hips, lower under control, then rise toward the other side, alternating.
3. Hanging windshield wipers · Advanced · reps
   Hanging from a pull-up bar with straight arms, the straight legs are raised together to about 90 degrees at the hips, then rotated as one unit to one side and across to the other, like a windshield wiper, while the shoul