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Foot Muscle Strengthening Exercises for Pes Planovalgus

Intrinsic vs Combined Foot Muscle Strengthening for Pes Planovalgus in Preschoolers: A Randomized Controlled Trial

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06548750
Enrollment
32
Registered
2024-08-12
Start date
2024-09-02
Completion date
2025-02-05
Last updated
2025-08-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Pes Planus

Keywords

Intrinsic foot muscle, Physiotherapy, Foot core, Flat foot, Extinsic foot muscle

Brief summary

Pes planovalgus is a common foot condition affecting the child population. It is characterized by the partial or complete collapse of the medial longitudinal arch with rearfoot eversion and forefoot abduction, which is associated with changes in lower extremity kinematics during dynamic activity. The lower extremity chain includes the foot, ankle, knee, and hip joints, with the feet acting as the base of support. However, due to their small size, maintaining balance can be challenging. Any small dynamic change in the foot, as the support base, can impact overall body posture. The foot arch, which can be pronated or supinated, affects proprioceptive input by altering joint movement, contact area, and muscle strategy for stability. Pes planovalgus, characterized by excessive subtalar pronation, lead to instability and hypermobility, requiring more neuromuscular control to maintain balance. As a result, flat feet can cause pathomechanical issues and compensatory actions in the lower extremity chain, affecting overall body balance. The effectiveness of exercise interventions, particularly foot intrinsic muscle strengthening exercises, in increasing the medial longitudinal arch in individuals with pes planus has been investigated in numerous studies. It is widely accepted that both intrinsic and extrinsic muscle groups play a crucial role in the formation, maintenance, and enhancement of foot arches. However, there is a lack of studies specifically examining the effectiveness of exercises aimed at strengthening these muscles in children with pes planovalgus. Therefore, the purpose of this study is to compare the effects of two corrective exercise programs focused on the improvement of the medial longitudinal arch in children with pes planovalgus: one incorporating routine intrinsic muscle exercises and the other combining them with extrinsic muscle exercises.

Detailed description

Voluntary children who have been diagnosed with pes planovalgus will be included in the study. Signed voluntary consent will be obtained from caregivers. Participants will be divided into two groups. Study groups will be as follows: a) Intervention Group (Intrinsic&Extrinsic Exercise), b) Control Group (Intrinsic Exercise).

Interventions

OTHERIntrinsic and Ectrinsic Exercise

Intrinsic and extrinsic muscle strengthening exercises

OTHERIntrinsic Exercise

Intrinsic muscle strengthening exercises

Sponsors

Istanbul University - Cerrahpasa
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Investigator)

Masking description

The assessor will not know which participant received which intervention.

Intervention model description

There will be an equal number of participants in the two groups randomized by the computer

Eligibility

Sex/Gender
ALL
Age
4 Years to 7 Years
Healthy volunteers
No

Inclusion criteria

* Presence of bilateral pes planovalgus, * Being between 4-7 years of age, * Having a body mass index within normal limits

Exclusion criteria

* Having high femoral anteversion, internal tibial torsion and metatarsus adductus * Having leg length inequality * Having any neurological, rheumatic, musculoskeletal, metabolic and connective tissue disease * Having a history of pain, deformity or surgery related to the vertebral column and lower extremities * Having a cognitive, mental or serious psychiatric disease * Having been involved in any exercise program or sports activity in the last six months

Design outcomes

Primary

MeasureTime frameDescription
Single Leg Stance Testchange from baseline balance at 2 monthsIt evaluates the participants' standing balance. The entire lower extremity will be positioned in full extension, while the other side will be positioned in 90 degree flexion of the lower extremity hip and knee. The time will be started when the participants' eyes are closed and the untested feet lose contact with the ground, and the time will be stopped when they put their feet back on the ground or when their body sway increases too much.
Timed-up and Go Testchange from baseline balance at 2 monthsTUG is a measure of dynamic balance and the risk of falling. It entails individuals rising from a chair, walking a distance of 3 feet, turning, and then sitting back down.

Secondary

MeasureTime frameDescription
Thomas Test2 times for 8 weeksThe Thomas Test will be used to determine the shortness of the hip flexors. The Thomas test is performed with the patient in the supine position with the gluteal folds on the short side of the stretcher. The untested side lower extremity is pulled towards the abdomen by performing hip-knee flexion; the tested side extremity is checked to see if it is separated from the stretcher.
Duncan-Ely Test2 times for 8 weeksThe Duncan-Ely test will be used to assess rectus femoris spasticity and shortness. In this test, the patient will be asked to lie in a prone position. The physiotherapist will attempt to quickly and passively bring the patient's knee joint on the side being assessed into full flexion. If the heel cannot touch the hip or the hip on the side being tested lifts off the stretcher, the test is considered positive.
Foot Posture Index-6 (FPI-6)2 times for 8 weeksFPI-6, which is a simple, fast and reliable method applicable to pediatric feet, defines the static postural analysis of the foot when equal load is applied to both feet during standing. Scores of 0-5 define normal foot; 6-9 define pes planovalgus and 10-12 define advanced pes planovalgus.
Navicular Drop Test (NDT)2 times for 8 weeksIt is one of the static foot assessment tools and represents the sagittal plane displacement of the navicular tuberosity in a neutral position. If the NDT is below 5 mm, the foot is in supination; if it is between 6-8 mm, the foot is neutral; and if it is above 9 mm, the foot is in pronation.
6-minutes Walking Test2 times for 8 weeksIt is a useful test to assess functional exercise capacity. Patients are asked to walk as fast as they can down a straight 30-meter corridor for six minutes.
Popliteal Angle Assessment2 times for 8 weeksIt will be used to detect hamstring shortness. The patient will be in the supine position, the tested side hip-knee will be flexed to 90°, and then passive extension will be applied to the knee. Goniometric measurement will be made when the end-feel is felt in the patient's knee joint.
Range of Motion2 times for 8 weeksFor goniometric measurement, the pivot point will be placed on the lateral malleolus. The fixed arm will be held parallel to the lateral midline of the fibula. The mobile arm will follow the lateral midline of the 5th metatarsal bone.

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026