All dogs need regular exercise, but compared to “working” or “gun” dogs (eg, Border Collies, Huskies, German shorthaired pointers), Ridgebacks need considerably less exercise.
Allocate an hour a day for dog exercise, with an off-lead run is best. It can be a little less sometimes, but exercise is very important to your dog’s health. It’s fine to couple your own exercise with your dogs, for example, accompanying you on a 5km jog.
With this much exercise, when left alone you dog will tend not to dig up the garden, tear apart furniture, or run in circles in the backyard for hours on end.