What may cause poor contraction of muscles during faradic treatment?

Poor contraction of muscles during faradic treatment can result from various factors, including grease left on the skin. When there is a residue of grease or oil on the skin, it acts as a barrier between the electrodes and the skin, diminishing the conductivity of the current. This reduced conductivity can lead to ineffective stimulation of the underlying muscles, resulting in a weak or poor contraction.

For effective faradic treatments, it's vital to ensure the skin is clean and free of any barriers that could impede the current's flow. Proper preparation of the skin enhances the treatment's effectiveness, ensuring that the muscles respond adequately to electrical stimulation.