What is PEP?

  • PEP stands for Positive Expiratory Pressure.
  • PEP involves breathing out against resistance, a bit like breathing through a straw.
  • The air that is waiting to be exhaled creates pressure in the lungs which helps splint, or hold, the airways open.
  • This gets air behind the mucus sitting in the airways to help move it towards the mouth so it can be coughed up and cleared.
  • Resistance can be provided in many different ways, using water, a mouthpiece or a mask.