Down Syndrome is a congenital disorder resulting from the trisomy of the human chromosome 21, which will determine, among other characteristics, intellectual disability and growth retardation. Reduced muscular strength, cardiovascular capacity, sleep problems, and impaired walking performance are also observed in Down syndrome participants. The estimated global prevalence is around 0.1% of live births. Children with Down's syndrome (DS) often have greater postural sway and delay in motor development. Muscle weakness and hypotonia, particularly of the lower extremities are theorized to impair their overall physical health and ability to perform daily activities. Posture, balance, and movement issues are common in children with Down syndrome. The purpose of this study is to examine the effects of Lower Limb Fitness Program on dynamic balance and mobility in children with Down Syndrome. This study explore that Lower Limb Fitness Program could improve the dynamic balance and mobility in children with DS.

Group A: Experimental group:

Group A will receive Range of motion for 5 minutes involving movements that stretch and strengthen the muscles and improve the stability. Proprioceptive training for 5 minutes which involve Single-leg balance Start with 20-30 seconds per leg and gradually increase to 1 minute 2-3 sets per leg. Weight bearing exercises on an uneven surface (such as Bosu ball or stability disc) and jumping rope 5-10 minutes/session. All proprioceptive training done firstly with eyes open and then with close eyes. Squat-to-stand training proprioceptive training lower extremity. This intervention aims to get the muscles ready before the actual intervention and improve proprioceptive ability. Exercises will be given three times a week for 6 weeks with session conducting 45 minutes per sessions which involve Squat-to-stand training will repeat 30 times 3 sets for 20 min. 2minute break after 1 set.. Balance training which involves standing activities with support, progressing to unsupported as tolerated for 10 minutes/session.

Group B: Control group:

In control group routine therapy will be given 3 times a week for 6 weeks with session conducting 45 minutes per sessions which involve standing balance exercises, sitting from chair to stand, heal to toe stand will be performed.

Data will be assessed by assessor at baseline by single leg stance test and at the end of 6th session of treatment (Pre and post).

Inclusion Criteria:

• Age 6-12 years
• Both Genders.
• Single leg stance Test: If unable to stand for 5 seconds or less client at greater risk of injury from fall.
• Ability to understand and follow basic instructions.
• Deficits in Balance

Exclusion Criteria:

• Children who are unable to engage in a structured fitness program due to behavioral or physical limitations.
• Children who have undergone lower limb surgery or experienced significant lower limb injuries in the past six months

Participants will get separate treatment protocols and possible efforts will be put to mask the both group about the treatment.