Speaking as an "over 50s" person myself, I can tell you that age is no barrier to elegant, powerful movement. You just need to know what to do to get this.
The Over 50s Value Pack contains the following: The Daily Five essential spinal movements, two additional neck movements, a hip (piriformis) exercise, and the best hamstring exercise from ONBP.
All together, these will form an effective basis for your maintenance program, and are a great way into understanding the Posture & Flexibility method as it is taught currently at the Australian National University. This has been running in the Sports and Recreation Association premises continuously for 20 years (2007).