“ZeroFit” class: doing nothing, but intensely

{
  "input": {
    "prompt": " Wide photo of a fitness studio: participants lie on yoga mats in silence, eyes closed, arms by sides. An instructor at the front holds a headset mic and a clipboard; a banner on the wall reads “ZeroFit” in minimalist type. The instructor leans forward as if whispering guidance (“Engage your core, spiritually”), while the class remains motionless."
  }
}