Blinding and Previous Experiences of Dry Needling

Real dry needling will be conducted according to Hong description, fast-in and fast-out interventions. The intervention will be applied until a total of four local twitch responses will be elicited

Sham dry needling with be conducted with a sham needle (Steitberger's Park sham device (PSD). This needle has a blunt tip and retractable handle that created the illusion of a needle penetrating the skin. When this needle touches the skin, a pricking sensation will be created. However, when pressure will be increased, the shaft of the needle disappears into the handle creating a sensation on the patient.