Effect of Light Emitting Diode Therapy on Muscle Fatigue (LED)

Inclusion Criteria:

• Healthy non athletics subjects.
• Age ranges from 20-40 years.
• Body mass index is less than 25 kg/m 2

Exclusion Criteria:

• Neurological deficit and recent injury to either upper extremity
• non diagnosed pain .
• Contraindications to LED irradiation (such as light hypersensitivity, fluctuating blood pressure, insufficient blood circulation, fever and inflammation of the skin)
• Conditions in which physical exertion is contraindicated (such as cardiovascular deficits, hypertension and respiratory problems)
• Restriction in shoulder or elbow range of motion;
• Neoplasm,
• Rheumatoid,
• Strength training in the past 6 months;
• Previous surgery in the spine or upper extremity;
• Complaints of pain in the shoulder, elbow,wrist, and trunk musculature system;
• Use of dietary supplements; and not in any other exercise program for at least the past 3 months.