Group fitness sessions Working out in a group has a positive effect on you. Entire fitness businesses are established with the intention that people enjoy working out in groups. This sense of community boosts sales and today has become the new exercise trend. While HIIT and yoga will always be popular group exercises, trapeze, roller skating, and trampoline are becoming increasingly popular. Weighted hula hoop workouts seem to be making a comeback, all thanks to TikTok. While it's tough to determine if something is a new fitness trend or fad, one thing is certain: group training's popularity cannot be ignored.