The aim of this study is to examine whether Pulsed Electromagnetic Field therapy combined with strengthening exercises will have a positive effect on quadriceps muscle strength in lower limb burn .

• Subjects: Sixty patients with lower limb burn, subdivided into two groups each one has 30 patients.

• Group (A) = Pulsed Electromagnetic Field therapy and quadriceps strengthening exercises group.

• Group (B) = quadriceps strengthening exercises group. • Equipment and tools:

  1. Measurements tools:

     Isokinetic dynamometer : to measure the quadriceps muscle peak torque before the treatment and after 8 weeks of treatment for both groups.

  2. Therapeutic tools:

Pulsed Electromagnetic Field therapy device and free weights for strengthening of quadriceps muscle.

Inclusion Criteria:

• - Patients are males.
• Their age will range from (25-40) years.
• Patients will suffer from second-degree burn ( Partial thickness of thermal injury).
• Total body surface area (TBSA) for the burns will be ranged from 20% to 35% .
• They will be selected from Outpatient Clinic of Faculty of Physical Therapy and Burn Unit at Om El-Obour Hospital.
• Patients will begin the training program after complete wound healing.
• All patients will receive traditional physical therapy program in the form of range of motion exercise, stretching, splinting, massage, functional training for ambulation and activities of daily living.
• Patients will be given their informed consent.

Exclusion Criteria:

• - Patients who participate in any rehabilitation program to improve muscle strength prior to the study.
• Musculoskeletal disorders that will impair performance during training and tests.
• Equilibrium disorders.
• Uncontrolled cardiovascular or pulmonary diseases .
• Neurological and renal disorders.
• metabolic or vascular disease with a neurological component such as diabetes,
• Malignant conditions.
• Psychiatric illness, severe behavior or cognitive disorders.
• Subjects with burn to the posterior thigh with knee flexion contracture, which affected the function of the quadriceps muscle.
• Lower limb lymphedema or lipoedema.
• Athletic subjects.
• Subjects with morbid obesity.

The participants are suffering from lower limb burn with second-degree burn ( Partial thickness of thermal injury) and total body surface area (TBSA) from 20% to 35%.The care provider are burn center stuff. The investigator is a physical therapist(myself).