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Duchenne Muscular Dystrophy (DMD)NCT07369609

Factors Influencing Physical Activity Levels in Children With Duchenne Muscular Dystrophy: An ICF-CY-Based Study

An observational study of Duchenne Muscular Dystrophy (DMD), run by Hacettepe University.

Not yet recruiting

Opening soon. The study is approved but enrolment has not started yet. Sites may already take enquiries.

Sites and contacts
Official record
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Trial summary

Duchenne Muscular Dystrophy (DMD) is a neuromuscular disease characterized not only by progressive muscle weakness but also by cognitive, behavioral, and psychosocial impairments. Read more about this study

Who is it for?
Ages 6 to 14 years, men only
Conditions the study is for
Duchenne Muscular Dystrophy (DMD)
How many people
30 participants
Where
No sites listed yet
Study dates
2 Feb 2026to 2 Sep 2027
Phase
Observational
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 6 to 14 years
  • Men only
  • No healthy volunteers
  • Child

Study population: The study population will consist of children diagnosed with Duchenne Muscular Dystrophy (DMD) and their parents or primary caregivers. Eligible children will be males aged 6 to 14 years with a confirmed diagnosis of DMD who are ambulatory, classified within the first four levels of the Brooke Lower Extremity Functional Classification, and able to follow assessment instructions. Parents or primary caregivers of these children who voluntarily agree to participate will also be included. Participants will be recruited from pediatric neuromuscular rehabilitation and physiotherapy settings.

Who may be able to join

  • Being a parent or primary caregiver of a child diagnosed with Duchenne Muscular Dystrophy (DMD),
  • Volunteering to participate in the study.
  • Having a confirmed diagnosis of Duchenne Muscular Dystrophy (DMD),
  • Being between 6 and 14 years of age,
  • Being classified within the first four levels of the Brooke Lower Extremity Functional Classification (ambulatory children),
  • Scoring >24 on the Modified Mini-Mental State Examination,
  • Volunteering to participate in the study.

Who cannot join

  • Having caregiving responsibilities for another child or adult with a disability, other than the child with DMD,
  • Experiencing difficulties in understanding or responding to the questionnaires administered by the physiotherapist.
  • Having undergone any musculoskeletal surgery or sustained an injury that could affect physical activity within the past 6 months,
  • Experiencing difficulty in understanding the test instructions administered by the physiotherapist and therefore being unable to appropriately perform the tests (performance-based assessments),
  • Experiencing difficulties in understanding or responding to the questionnaires administered by the physiotherapist.

Trial locations and contacts

No sites are listed yet. Contact the study team or a site near you to ask about taking part.

Serenay Zorlu Develik, PhD Candidate contact

+90 546 665 33 11

serenayyzorlu@gmail.com

İpek Gürbüz, Professor contact

About this study

Official title: Investigation of Factors Affecting Physical Activity Level in Children With Duchenne Muscular Dystrophy Based on the International Classification of Functioning, Disability and Health - Child and Youth Version

Duchenne Muscular Dystrophy (DMD) is a neuromuscular disease characterized not only by progressive muscle weakness but also by cognitive, behavioral, and psychosocial impairments. Motor losses that occur during disease progression reduce physical activity levels in children and increase the risk of developing a sedentary lifestyle. Interventions aimed at maintaining or promoting physical activity in children with DMD are important for preventing secondary complications associated with disuse and physical inactivity. To develop effective interventions, there is a need for comprehensive knowledge regarding the factors that influence physical activity levels.

Current literature indicates that, in typically developing children, physical activity levels are influenced not only by motor factors but also by cognitive status, sleep, behavioral characteristics, and family-related environmental and psychosocial factors. However, information regarding these multidimensional factors affecting physical activity levels in children with DMD remains limited.

This study aims to identify the body functions, activity, participation, environmental, and personal factors affecting physical activity levels in children with DMD based on the framework of the International Classification of Functioning, Disability and Health - Children and Youth Version (ICF-CY). Accordingly, the effects of posture, functional capacity, ambulatory status, balance, other musculoskeletal parameters, cognitive status, sleep habits and sleep quality, fear of falling, and behavioral characteristics, as well as family-related factors including parenting style, perceptions of physical activity, stress level, attitudes and perceptions toward daily life events, and disease impact, will be evaluated. The impact of these variables on physical activity levels and the magnitude of this effect will be examined within the ICF-CY framework.

Read the detailed description

Duchenne Muscular Dystrophy (DMD) is the most common inherited neuromuscular disorder, affecting approximately one in 3,500-5,000 live male births worldwide. It is caused by various mutations in the dystrophin gene located on Xp21.2, most commonly deletions and duplications, leading to the absence of dystrophin protein in skeletal muscle, cardiac muscle, and the central nervous system. The lack of dystrophin results in progressive muscle weakness beginning in early childhood, typically between 18 months and 3 years of age, followed by gradual loss of ambulation, increasing dependence in daily activities, and the development of serious cardiac, respiratory, and orthopedic complications later in life.

In addition to motor impairments, dystrophin deficiency in the brain has been associated with cognitive, behavioral, and psychosocial difficulties. DMD-related mutations affect multiple dystrophin isoforms that are expressed in key brain regions involved in attention, memory, executive functions, and emotional regulation. As a result, children with DMD frequently present with impairments in attention, executive functioning, learning, behavior, and emotional regulation. These non-motor manifestations further complicate disease management and have a substantial impact on participation in daily life and overall quality of life for both children and their families.

During disease progression, increasing motor limitations significantly restrict children's engagement in physical activity and increase the likelihood of adopting a sedentary lifestyle. Reduced physical activity contributes to secondary complications related to disuse, such as decreased cardiorespiratory fitness, reduced bone mineral density, increased fatigue, and further functional decline. Therefore, maintaining and supporting physical activity is considered a critical component of comprehensive care in children with DMD. However, the development of effective and sustainable physical activity-related interventions requires a thorough understanding of the factors influencing physical activity behavior in this population.

In typically developing children, physical activity levels are known to be influenced by a wide range of motor and non-motor factors, including physical function, cognitive status, sleep habits, behavioral characteristics, and family-related environmental and psychosocial factors. Although similar interactions are likely to exist in children with DMD, current evidence regarding the multidimensional determinants of physical activity in this population remains limited. In particular, the combined influence of body functions, activity limitations, participation restrictions, and family-related factors has not been sufficiently investigated within a comprehensive conceptual framework.

The International Classification of Functioning, Disability and Health - Children and Youth Version (ICF-CY), developed by the World Health Organization, provides a biopsychosocial model that enables a holistic evaluation of health by considering body functions and structures, activity, participation, and contextual factors. Using the ICF-CY framework allows for the systematic examination of the dynamic interactions between individual and environmental factors that shape physical activity behavior in children with chronic health conditions.

Therefore, the primary aim of this study is to identify the factors affecting physical activity levels in children with Duchenne Muscular Dystrophy within the ICF-CY framework. Specifically, the study will evaluate the influence of posture, functional capacity, ambulatory status, balance, fatigue, gait, and other musculoskeletal parameters, as well as cognitive status, sleep habits and sleep quality, fear of falling, behavioral characteristics, and motivation on children's physical activity levels. In addition, family-related factors-including caregiver sleep quality, parenting style, perceptions of physical activity, stress level, attitudes and perceptions toward daily life events, and perceived disease impact-will be examined to determine their contribution to physical activity behavior.

By adopting a comprehensive ICF-CY-based approach, this study aims to clarify the relative contribution and magnitude of individual, environmental, and psychosocial factors influencing physical activity levels in children with DMD. The findings are expected to provide clinically relevant insights that may guide the development of targeted, family-centered, and multidimensional interventions aimed at maintaining or enhancing physical activity and improving long-term health outcomes and quality of life in children with Duchenne Muscular Dystrophy.

Keywords
duchenne muscular dystrophy, physical activity, ICF-CY
Medical subject headings
Muscular Dystrophy, Duchenne, Motor Activity

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Physical Activity Questionnaire for Children-PAQ-C

    The physical activity level of children with DMD will be assessed using the Physical Activity Questionnaire for Children (PAQ-C).

    Measured: At baseline (single assessment at enrollment)

  2. The New York Posture Rating Chart

    The New York Posture Rating Chart will be used to assess posture in children with DMD.

    Measured: At baseline (single assessment at enrollment)

  3. Six Minute Walk Test (6MWT)

    The 6MWT will be used to evaluate functional capacity in children with DMD.

    Measured: At baseline (single assessment at enrollment)

  4. Pediatric Quality of Life Inventory - Multidimensional Fatigue Scale (PedsQL-MFS)

    Fatigue in children with DMD will be assessed using the PedsQL-MFS.

    Measured: At baseline (single assessment at enrollment)

  5. Duchenne Muscular Dystrophy Gait Assessment Scale (DMD-GAS)

    Gait characteristics of children with DMD will be evaluated using the DMD-GAS.

    Measured: At baseline (single assessment at enrollment)

  6. North Star Ambulatory Assessment (NSAA)

    Ambulatory status of children with DMD will be assessed using the NSAA.

    Measured: At baseline (single assessment at enrollment)

  7. Four Square Step Test (FSST)

    Balance in children with DMD will be evaluated using the FSST.

    Measured: At baseline (single assessment at enrollment)

  8. Lower Extremity Muscle Strength Assessment

    Myometric measurements will be performed to assess lower extremity muscle strength in children with DMD.

    Measured: At baseline (single assessment at enrollment)

  9. Assessment of Lower Extremity Joint Range of Motion

    Active and passive range of motion of the lower extremity joints will be assessed using goniometric measurements.

    Measured: At baseline (single assessment at enrollment)

  10. Muscle Shortness Assessment

    Muscle length tests will be applied to determine muscle shortness in children with DMD.

    Measured: At baseline (single assessment at enrollment)

  11. Modified Mini-Mental State Examination (MMSE)

    The Modified MMSE will be used to determine the cognitive level of children with DMD.

    Measured: At baseline (single assessment at enrollment)

  12. Trail Making Test

    The Trail Making Test will be used to assess cognitive functions such as attention, planning, and executive functions in children with DMD.

    Measured: At baseline (single assessment at enrollment)

  13. Children's Sleep Habits Questionnaire (CSHQ) - Short Form

    The CSHQ will be used to assess sleep problems in children with DMD.

    Measured: At baseline (single assessment at enrollment)

  14. Pediatric Sleep Questionnaire - Sleep-Related Breathing Disorder Subscale (PSQ-SRBD)

    The PSQ-SRBD subscale will be used to evaluate sleep-related breathing disorders in children with DMD.

    Measured: At baseline (single assessment at enrollment)

  15. ICF-Based Fear of Falling Form for Pediatric Neuromuscular Diseases (Ped-FOF)

    The Ped-FOF will be used to assess fear of falling in children with DMD.

    Measured: At baseline (single assessment at enrollment)

  16. Strengths and Difficulties Questionnaire (SDQ)

    Behavioral problems in children with DMD will be assessed using the SDQ.

    Measured: At baseline (single assessment at enrollment)

  17. Pediatric Motivation Scale (PMS)

    Motivation levels of children with DMD will be assessed using the PMS.

    Measured: At baseline (single assessment at enrollment)

  18. Pittsburgh Sleep Quality Index (PSQI)

    Parental sleep quality will be evaluated using the PSQI.

    Measured: At baseline (single assessment at enrollment)

  19. Parenting Scale

    The Parenting Scale will be used to assess parents' disciplinary practices.

    Measured: At baseline (single assessment at enrollment)

  20. Perceived Barriers to Physical Activity Scale

    Parents' perceived barriers to participation in physical activity will be assessed using the Perceived Barriers to Physical Activity Scale.

    Measured: At baseline (single assessment at enrollment)

  21. Perceived Stress Scale (PSS)

    Parental stress levels will be assessed using the PSS.

    Measured: At baseline (single assessment at enrollment)

  22. Cognitive Control and Flexibility Scale (CCFS)

    The CCFS will be used to assess parents' cognitive flexibility in stressful situations.

    Measured: At baseline (single assessment at enrollment)

  23. Impact on Family Scale (IPFAM)

    The level of disease-related impact on parents will be assessed using the IPFAM.

    Measured: At baseline (single assessment at enrollment)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted27 Jan 2026
  2. Study start2 Feb 2026 (estimated)
  3. Primary completion2 Feb 2027 (estimated)
  4. Study completion2 Sep 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Case only
Time perspective
Prospective
Enrolment
30 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07369609
Sponsor's protocol ID
FTREK25/64
Status last verified
Jan 2026
First submitted
18 Jan 2026
Last updated
29 Jan 2026
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

An observational study of Duchenne Muscular Dystrophy (DMD), run by Hacettepe University.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 7 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: opening soon, as of the sponsor's last update on 29 Jan 2026. Status can change between updates, so confirm with the study contact before making plans.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Serenay Zorlu Develik, PhD Candidate (+90 546 665 33 11, serenayyzorlu@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Physical Activity Questionnaire for Children-PAQ-C (time frame: At baseline (single assessment at enrollment)). The study lists 23 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Jan 2026.

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