Comparison of the effects of two types of insoles on the leg muscles of people with flat feet

Comparison of the short-term effect of two types of static and functional orthoses on morphology of the extrinsic muscles of the foot in people with flexible flat feet

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT20251101067853N1

Enrollment

Registered

2025-11-15

Start date

2026-01-03

Completion date

Unknown

Last updated

2025-12-08

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

Conditions

flat foot. M21.4

Interventions

Intervention 1: Control group: The static orthosis is made with a rigid and inflexible internal longitudinal arch from Plastozot material. This orthosis is cut using a CNC machine, which is manufactur

Eligibility

Sex/Gender

All

Age

18 Years to 44 Years

Inclusion criteria

Inclusion criteria: Asymptomatic adults with flexible flatfoot Active young individuals who spend at least 6 hours outside the home daily In the age range of 18 to 44 years Foot posture Index Score: 6 to 11 Individuals who have an angle greater than 4 degrees between the calcaneal bone and the vertical line to the ground in the standing position (resting calcaneal position) Body Mass Index in the normal range (18.5-24.9) Lack of professional sports experience

Exclusion criteria

Exclusion criteria: Rigid flat foot Pain in the lower limb Plantar fasciitis Ankle instability History of trauma and orthopedic surgery in the past 6 months pregnancy Orthopedic and inflammatory diseases History of using foot orthoses or performing foot exercises in the 6 months prior to the study

Design outcomes

Primary

Measure	Time frame
Thickness of the anterior tibialis muscle. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Cross-sectional area of the anterior tibialis muscle. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Thickness of the posterior tibialis muscle. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Cross-sectional area of the peroneus longus muscle. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Cross-sectional area of the posterior tibialis muscle. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Peroneus longus muscle thickness. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Peroneus brevis muscle thickness. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Cross-sectional area of the peroneus brevis muscle. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.	—

Measure

Time frame

Thickness of the anterior tibialis muscle. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Cross-sectional area of the anterior tibialis muscle. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Thickness of the posterior tibialis muscle. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Cross-sectional area of the peroneus longus muscle. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Cross-sectional area of the posterior tibialis muscle. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Peroneus longus muscle thickness. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Peroneus brevis muscle thickness. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.;Cross-sectional area of the peroneus brevis muscle. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Ultrasonography.

—

Secondary

Measure	Time frame
Foot posture index score. Timepoint: The beginning of the study before the intervention and 12 weeks after using the intervention. Method of measurement: Observation.	—

Countries

Iran (Islamic Republic of)

Contacts

Public ContactMohammad yasin taheri

Shahid Beheshti University of Medical Sciences

mohammadyasintaheri3315@gmail.com+98 21 7754 2057

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026