ZUU is a high-intensity workout, and like any serious training, it's not without risks. Trainers are pretty up-front about post-workout muscle soreness, which you'll most likely feel for a few days.
Over time, the idea is that ZUU can help build fitness, improve flexibility and mobility, and obviously burn fat. Some even believe it can "turn back the clock" and fight the ageing process. "As we age we lose flexibility, mobility, functional strength, cardiovascular fitness and muscle mass. The unique movements we use in ZUU challenge all of these aspects," trainer Matt Henderson told Stuff.
As with any workout, make sure you move within your limits, and chat to your GP if you're worried about your heart, back or other adverse health effects.