Use any 3 power cords to begin with to see which tension you like best. It should be on the lighter side as a beginner.
Lie on your back with your head on the Headrest. Attach a Foot Strap securely to each foot. Extend your legs to a 45-degree position and rest your arms at your sides. Keep your legs straight, heels together with feet flexed, and turn your toes out comfortably so your knees are open. Maintaining the 45-degree leg position, bend your knees in toward your shoulders. Keep your heels together and your back in contact with the Glideboard. Pause for a moment. Then, slowly straighten your legs fully to the starting position.