Obesity is one of the main factors that contribute to an acquired flat foot deformity which in turn impairs the balance strategies. The purpose of the current study was to compare the effect of plyometric exercises with flatfoot corrective exercise on balance, foot posture, and functional mobility in obese children with flexible flatfoot.

A sample of 47 male children participated in the current study. The participants were selected from different elementary schools in Taif, Saudi Arabia. Their age ranged from 7 to 11 years. the sample was randomly divided into 3 groups: the experimental group I, (EGI), the experimental group II, (EGII), and the control group (CG). The EGI received a plyometric exercise program. The EGII received the corrective exercises 2 sessions per week for 10 weeks. The control group did not perform any planned physical activities during the intervention period but continued in their routine physical activities. The Prokin system was used to assess the static balance, timed up and go test was used to assess functional mobility, and Navicular drop test was used to assess the degree of flatfoot deformity, prior to and after the intervention for all groups.

Inclusion Criteria:

• Body mass index percentile equal to or greater than the 95th percentile
• All had no previous history of strength or balance training or involvement in competitive sports emphasizing muscular strength or balance.
• All participants had balance deficiency and mobile flat foot.

Exclusion Criteria:

• Previous injury to the lower limb required medical care.
• Confounding conditions, such as a deformity of or surgery in the lower limb.
• visual impairment, or neuromuscular disorders.
• engagement in obesity treatment programs, three months prior to the study.

A sample of 47 male children participated in the current study without having female participants because of the cultural perspective.