Muscle Activity of the Gastrocnemius and Soleus Muscles by Surface Electromyography.

Muscle Activity of the Gastrocnemius and Soleus Muscles During a Specific Contraction Task Assessed by Surface Electromyography

This cross-sectional, comparative study aims to evaluate and compare the surface electromyographic (sEMG) activity of the gastrocnemius (medial and lateral) and soleus muscles during static and dynamic contraction tasks. Participants will perform three tests-resting state, isometric, concentric, and eccentric contraction, and dynamic gait-with bilateral measurements. A subgroup analysis will examine muscle activity variations based on foot posture, using the Foot Posture Index (FPI). The study uses the validated mDurance® sEMG system to obtain objective data under controlled lab conditions. The findings will enhance understanding of the functional role of each muscle and could inform rehabilitation and injury prevention strategies.

Inclusion Criteria:

• Age between 18 and 30 years.

• No history of severe musculoskeletal disorders in the lower limbs.

• No recent surgery or injury in the last 6 months.

• No dermatological conditions affecting electrode placement.

• Not allergic to adhesives.

• Ability to perform the task without limitation.

  •. No high-intensity exercise in the 12 hours before testing

• Ability to provide informed consent and complete the assessment

Exclusion Criteria:

• Reduced lower limb mobility.
• Neuromuscular or skeletal conditions affecting the calf region.
• Intense physical activity 12 hours before testing.
• Lack of informed consent.