fitness and Physical activity will be evaluate in short stature children, using the Euro Fitness testing and the Wingate anaerobic test. the fitness level will be evaluate in healthy short children and with growth hormone deficiency at base line and after 6 month .

The Euro Fitness testing which is a series of field testing for children evaluating aerobic, strength and flexibility and the Wingate anaerobic test which is a 30 seconds maximum pedaling against resistance on bike for evaluating the anaerobic fitness.

the fitness test will be done in healthy short stature children and in growth hormone deficiency or idiopathic short stature from the endocrine unit in Meir medical center The test will be done at base line and after 6 month . The fitness test in child with growth hormone deficiency will be done before starting GH treatment and 6 month later.

The child will be asked to fill a questioner about his daily physical activity Anthropometric measurement will be taking including weight, height and fat percent. Details about age, sex, tanner stage, indication for growth hormone, dose, insulin growth factor-1 (IGF1) level will be taken from the medical file.

Inclusion Criteria:

• short stature
• Physical healthy
• Mental healthy
• Capable to perform fitness test

Exclusion Criteria:

• Cardiac disease that interfere or risk the child during physical activity
• Respiratory disease that interfere or risk the child during physical activity
• Musculoskeletal disease interfering physical preformance.
• Family history of death for unknown reasons at an early age.
• Uncontroled thyroid diseae

short stature children