All of the ring exercises are scalable from very, very easy to extremely difficult. For example:
- Support: this can be done by anyone; easy, support on toes, hard; support for time to failure.
- Push-up: easy, rings at chest height; hard rings inch off ground, feet elevated
- Body Row: easy, rings at head height; hard, low rings, feet elevated
- Dip: easy, low jump to support; hard, weighted dips
Of course the rings are essential for learning the muscle-up as well.
get them here.