0 a thick, strong ring made of rubber or a similar material, used in exercises to make the muscles stronger:
As far as workout equipment goes, stability balls and resistance bands are two of my favourites.
Try the same drill but with a partner pulling against you with resistance bands attached to the waist.
Use free weights, resistance bands, or moves that use your own body weight to build strength.
These easy-to-follow workouts use resistance bands in creative and challenging ways.