The purpose of the study is to evaluate which is more effective pulsed electromagnetic field therapy or whole-body vibration on quadriceps strength after chronic burn

Severe burn is associated with excessive muscle wasting and atrophy. Muscle wasting is defined as unintentional weight loss of 5%- 10% of muscle mass, and severely burned patients are reported to lose up to 25% of total body mass acutely. (Dirks et al., 2016). These are worsened by deconditioning (eg, prolonged bed rest, immobilization, and inactivity). (Baker et al., 2007).

Furthermore, the need of this study is developed from the lack in the quantitative knowledge and information in the published studies about the effect of pulsed electromagnetic field therapy and whole-body vibration on quadriceps strength after chronic burn.

This study will be designed to provide a guideline about the effect of pulsed electromagnetic field therapy and whole-body vibration on quadriceps strength after chronic burn

Inclusion Criteria:

1. Both sex.
2. Their ages will be ranged from 25 to 40 years.
3. Have second degree burn of 10 % to 25 %.
4. Their body mass index (BMI) will not exceed 34.9 Kg/m2.
5. All patients will be clinically and medically stable when attending the study.

Exclusion Criteria:

1. Unstable cardiovascular problems like arrhythmia and heart failure.
2. Diabetes mellitus.
3. Chronic chest disease.
4. Patients on medications affecting muscle power as steroids.
5. Auditory and visual problems.
6. Pregnancy & lactation.
7. Patients with history of epilepsy.
8. Clinically significant peripheral vascular disease.
9. Musculoskeletal or neurological limitation to physical exercise.
10. Any cognitive impairment that interferes with prescribed exercise procedures.
11. Amputation of lower limb.