Anyone tried the latest fad/torture routine?

Local gym’s starting classes this coming week and I’m not sure about giving it a spin.

I’ve never seen it promoted by an over-enthusiastic perma-tanned pneumatically-chested American fitness model* on those long-winded early morning TV ‘adverts’ … so it may actually work

(*who was probably never overweight or unfit in the first place but want you to think you’ll look like them if you buy what they’re shamelessly plugging)