This leg-focused video goes through many of movements you would do on a Reformer with your feet in the straps or on Cadillac/Tower if you were using the Leg Springs. This workout is done completely on your back so there's no getting up & down or rolling up, and modifications are given for those with back issues.. If you want to really challenge yourself, add ankle weights to build up strength and control!
A link to Angie's Props Store is included below the video if you don't have Ankle Weights yet and want ones recommended by Angie.