Skeletal muscle uncoupling is the process where your muscles burn calories on the cellular level to generate heat during Cool Fat Burner induced cold stress.
Skeletal muscle uncoupling is not shivering — it does not involve movement of the muscles, and along with Brown Fat, is the active component of “Moderate” intensity cold thermogenesis.
If you have little brown adipose tissue, then skeletal muscle uncoupling takes over during your Cool Fat Burner sessions, until you become cold-adapted and build up your reserve of BAT.