Adolescent kyphotic girls will participate in this study. They will be divided into two groups. Group A: The control group will receive a therapeutic exercise program. Group B: The study group will receive the same intervention as Group A in addition to diaphragmatic myofascial release. They will be assessed at baseline and after three successive months of interventions for the following outcomes: Cobb angle by x-ray and pulmonary functions (vital capacity, forced vital capacity and maximum ventilatory volume) by computerized spirometer

Adolescent kyphotic girls with an age range of 12-15 years old will participate in this study. They will be divided into two groups. Group A: The control group will receive a therapeutic exercise program. Group B: The study group will receive the same intervention as Group A in addition to diaphragmatic myofascial release. Both groupss will receive intervention for three three successive months. They will be be assessed at baseline and after three three successive months of interventions for the following outcomes:

Primary outcome: Cobb angle by x-ray Secondary outcome: pulmonary functions (vital capacity, forced vital capacity and maximum ventilatory volume) by computerized spirometer

Inclusion Criteria:

• Adolescents girls with thoracic kyphosis with cobb angle ranged from 45 to 55 degree.
• Age ranged from 12 to 15 years old.
• selected from preparatory and secondary schools.

Exclusion Criteria:

• free from any associated deformities other than the thoracic kyphotic deformity.