Therapist-dependent Dose of Spinal TENS

Intensity Matters: Therapist-dependent Dose of Spinal Transcutaneous Electrical Nerve Stimulation

The intensity used during transcutaneous electrical nerve stimulation (TENS) in both, clinical practice and research studies, is often based on subjective commands such as "strong but comfortable sensation". There is not consensus regarding the effectiveness dose of TENS

Twenty healthy volunteers will divide into two groups: Therapist 1 and Therapist 2. Both therapist will apply spinal TENS and sham stimulation for 40min in random order to each subject, at an intensity to produce a "strong but comfortable sensation".

Inclusion Criteria:

• Healthy volunteers between 18 and 60 years old

Exclusion Criteria:

• Musculoskeletal pathology of the lower limbs
• History of neuromuscular disease
• Unable to tolerate electrical current
• Allergy to the electrode material
• Pacemaker or any implanted device
• Epilepsy
• Neurotrauma
• Recent surgical procedures
• Pain affecting the lower limbs or lower back
• Diabetes
• Pregnancy
• Cancer