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Active, not recruitingNCT06482580Updated Jul 3, 2024

The Effect of Different Exercises on Lower Extremity Performance in Flexible Flatfoot

An interventional study of PNF exercise and Clam exercise in Flexible Flatfoot, sponsored by Mustafa Kemal University. Active, not recruiting at 1 site in Turkey. Open to participants aged 18 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-07-03.

Sponsored by Mustafa Kemal University · Not applicable, Interventional, and Treatment

From the registry’s dates

  • Primary completion was expected by Jul 2024, 2 years 2 months ago, but the record still lists the study as active, not recruiting.
Phase
Not applicable
Study type
Interventional
Enrollment
60
Allocation
Randomized
Ages
18 Years to 45 Years
Sex
All
01

Study summary

In the study, the effects of two different strengthening exercises combined with short foot exercise on lower extremity functional performance and muscle strength will be examined and compared in adults aged 18-45 years with flexible flatfoot. This study was designed as an experimental, 3-arm, parallel group, double-blind randomized controlled study that included a 6-week intervention period.

Read the detailed description

Participants will be randomly divided into 3 different groups (control group, foot-ankle exercise group, hip exercise group). The control group will be instructed to perform only short foot exercise; the foot-ankle exercise group will be instructed to perform 3-dimensional foot-ankle extension exercise in proprioceptive neuromuscular facilitation (PNF) pattern in addition to short foot exercise; the hip exercise group will be instructed to perform hip abductor and external rotator muscle strengthening exercise (clam exercise) in addition to short foot exercise. Foot-ankle and hip exercises will be performed against resistance with the help of an elastic band, 3 days a week under the supervision of a physiotherapist and progression will be made by changing to a higher level of difficulty band color every 2 weeks. Short foot exercise will be performed every day of the week (3 days under the supervision of a physiotherapist; the rest of the days as a home exercise program) and will be progressed by changing position (sitting, standing, on one leg respectively) every 2 weeks. All exercises will be performed for 6 weeks. Assessments will be performed at the beginning and end of the exercises by another researcher blinded to group allocation. Isometric muscle strength of the intrinsic foot, four-way ankle circumference and hip abductor-external rotator muscles, endurance of the plantar flexors, forward jump and dynamic balance performance will be evaluated respectively.

02

Conditions studied

  • Flexible Flatfoot

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Keywords

  • Foot deformities
  • Intrinsic foot muscle training
  • Muscle strenghening
  • Short-foot exercises
  • Performance
  • Proprioceptive neuromuscular facilitation
03

In context

Flatfoot

168 studies on the registry are indexed under Flatfoot; 41 are open to participants now.

This study's planned enrollment of 60 is above the median of 37 across 121 interventional studies indexed under Flatfoot.

Browse Flatfoot studies →

Lead sponsor

Mustafa Kemal University is the lead sponsor of 71 studies on the registry; 18 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 45 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Age range is 18-45 years
  • Navicular drop is 10 mm or more
  • Getting a value of +6 points or more from the Foot Posture Index-6

Exclusion criteria

Exclusion Criteria:

  • Orthopedic and rheumatological diseases of the spinal region and lower extremities
  • Surgery history of the spine and lower extremities
  • Neurological and systemic disorders
  • Describe lower extremity and/or lower back pain in the last 6 months
  • Disorders that may affect cognition and balance (otitis media, visual impairment, etc.)
  • Body mass index being above normal values (18-24.9 kg/m2)
  • Having rigid flat feet and/or hallux rigidus-limitus deformity
  • Being involved in regular sports or exercise
  • Having received any physiotherapy or rehabilitation treatment for flat feet or hips in the last year
05

Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Outcomes assessor)
Enrollment
60 participants (estimated)

Study arms

  • Experimental
    PNF exercise group

    All groups will be subjected to exercise training for 6 weeks: PNF exercise group will receive 3-dimensional (3D) foot-ankle extension exercise and short-foot exercise. The exercise will be performed 2 days a week under the supervision of a physiotherapist and 1 day as home exercise; KA exercise will be performed daily, 2 days under the supervision of a physiotherapist and the other days as home exercise.

    Other: PNF exercise · Other: Short-foot exercise

  • Experimental
    Clam exercise group

    All groups will be subjected to exercise training for 6 weeks: Clam exercise group will receive mussel exercise and short-foot exercise. The exercise will be performed 2 days a week under the supervision of a physiotherapist and 1 day as home exercise; KA exercise will be performed daily, 2 days under the supervision of a physiotherapist and the other days as home exercise.

    Other: Clam exercise · Other: Short-foot exercise

  • Active comparator
    Control group

    All groups will be subjected to exercise training for 6 weeks: Control group will receive only KA exercise and this exercise will be performed daily, 2 days under the supervision of a physiotherapist and the other days as home exercise.

    Other: Short-foot exercise

Interventions

  • OtherPNF exercise

    Ankle and foot exercises practiced for 6 weeks.

  • OtherClam exercise

    Hip exercise practiced for 6 weeks.

  • OtherShort-foot exercise

    Foot exercise practiced together for 6 weeks.

06

What researchers measure

Primary outcomes

  1. Medial longitudinal arch height

    Medial longitudinal arch height will be evaluated with the navicular drop test.

    Time frame: 6 weeks

  2. Static foot posture

    Static foot posture will be evaluated with Foot Posture Index-6.

    Time frame: 6 weeks

Secondary outcomes

  1. Isometric muscle strength

    Abductor hallucis, flexor digitorum brevis, flexor hallucis brevis, 4-way ankle muscles and hip abductor/external rotator isometric muscle strength will be evaluated using a digital hand-held dynamometer.

    Time frame: 6 weeks

  2. Lower extremity functional performance

    With plantar flexor focused endurance performance heel raise test; with dynamic balance Y balance test; Single leg forward jump performance will be evaluated with the single leg hop for distance test.

    Time frame: 6 weeks

07

Study locations

1 site
  • Gazi University, Institute of Health Sciences, Department of Physiotherapy and Rehabilitation
    Ankara, Çankaya 06540, Turkey
08

References and documents

Publications

  • Huang C, Chen LY, Liao YH, Masodsai K, Lin YY. Effects of the Short-Foot Exercise on Foot Alignment and Muscle Hypertrophy in Flatfoot Individuals: A Meta-Analysis. Int J Environ Res Public Health. 2022 Sep 22;19(19):11994. doi: 10.3390/ijerph191911994. PubMed 36231295 ↗
  • Engkananuwat P, Kanlayanaphotporn R. Gluteus medius muscle strengthening exercise effects on medial longitudinal arch height in individuals with flexible flatfoot: a randomized controlled trial. J Exerc Rehabil. 2023 Feb 23;19(1):57-66. doi: 10.12965/jer.2244572.286. eCollection 2023 Feb. PubMed 36910682 ↗
  • Okamura K, Fukuda K, Oki S, Ono T, Tanaka S, Kanai S. Effects of plantar intrinsic foot muscle strengthening exercise on static and dynamic foot kinematics: A pilot randomized controlled single-blind trial in individuals with pes planus. Gait Posture. 2020 Jan;75:40-45. doi: 10.1016/j.gaitpost.2019.09.030. Epub 2019 Sep 29. PubMed 31590069 ↗
  • Pabon-Carrasco M, Castro-Mendez A, Vilar-Palomo S, Jimenez-Cebrian AM, Garcia-Paya I, Palomo-Toucedo IC. Randomized Clinical Trial: The Effect of Exercise of the Intrinsic Muscle on Foot Pronation. Int J Environ Res Public Health. 2020 Jul 7;17(13):4882. doi: 10.3390/ijerph17134882. PubMed 32645830 ↗

Individual participant data

Plan to share: Undecided

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 3, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06482580
Lead sponsor
Mustafa Kemal University
Responsible party
Dilek Hande Esen (MSc, PT, Principal Investigator, Mustafa Kemal University) — Principal investigator
First posted
Jul 1, 2024
Start date
Apr 30, 2024
Primary completion
Jul 30, 2024 (estimated)
Completion
Sep 30, 2024 (estimated)
Last update
Jul 3, 2024

Study contacts

Dilek Esen, PhD. c
principal investigator · Gazi University, Institute of Health Sciences, Department of Physiotherapy and Rehabilitation

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is active, not recruiting, as verified in Jul 2024. You cannot join it, but the record below documents what was studied.

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