Skip to content

Effects of Foot Core Exercises in Patients With Total Hip Arthroplasty

Investigation of the Effects of Foot Core Exercises on Lower Extremity Muscle Strength, Functional Parameters, and Morphological and Viscoelastic Properties of Foot and Ankle Periarticular Structures in Patients With Total Hip Arthroplasty

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07665801
Enrollment
50
Registered
2026-06-24
Start date
2026-03-23
Completion date
2027-05-31
Last updated
2026-06-24

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

Conditions

Total Hip Arthroplasty (THA)

Keywords

foot core exercises, ultrasound imaging, ultrasonography, Postoperative exercises

Brief summary

The goal of this clinical trial is to investigate the effects of foot core exercises on lower extremity muscle strength, viscoelastic properties, functional parameters, foot and ankle posture, balance, and the morphological characteristics of periarticular structures of the foot and ankle in individuals with total hip arthroplasty. The main questions it aims to answer are: * Does foot core exercises affect morphological characteristics of the periarticular structures surrounding the foot and ankle? * Does foot core exercises affect viscoelastic properties of the periarticular structures surrounding the foot and ankle? * Does foot core exercises affect lower extremity muscle strength? * Does foot core exercises affect lower extremity functional parameters and balance in individuals with total hip arthroplasty? The researchers will compare the group performing foot core exercises with the group performing routine hip exercises that do not include foot core exercises. Participitants will: * Participants will receive an exercise log after a specialist physiotherapist demonstrates the exercises in practice at the third postoperative mounth. * Visit the clinic every two months from postoperative mounth 3 to month 7 for routine follow-ups and progression of exercises. * Except for the control sessions held every two mounths, patients will be followed up through weekly phone calls. * Participants will complete an exercise diary indicating that they performed the exercises prescribed for each week, and they will bring their diaries with them to the follow-up sessions.

Interventions

OTHERHip Rehabilitation Exercise Program

5 days per week, 40 minutes per session, for 12 weeks.

OTHERFoot-Core Exercise Program

5 days per week, 40 minutes per session, for 12 weeks

Sponsors

Hacettepe University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
50 Years to 80 Years
Healthy volunteers
No

Inclusion criteria

* Being between 50 and 80 years old, * Having at least 2 months elapsed since total hip arthroplasty surgery, * Being willing to participate in the study, * Being literate.

Exclusion criteria

* Having undergone revision total hip arthroplasty surgery, * Having a cognitive level below 21 on the MoCA scale, or having any neurological or rheumatological disease, * Inability to ambulate, * Having any history of lower extremity trauma or other surgical procedures, * Having toe-related pathologies that may affect pressure distribution and the course of exercise, such as hallux valgus or Morton's neuroma.

Design outcomes

Primary

MeasureTime frameDescription
Ultrasonographic muscle thickness of foot and ankle periarticular structuresFrom enrollment to the end of treatment at 12 weeksThe muscle thickness of the foot and ankle periarticular structures will be evaluated using ultrasonography. Ultrasonographic examinations will be performed in accordance with the EURO-MUSCULUS/USPRM foot and ankle protocols (26, 27), using a Clarius ultrasound system (Clarius Mobile Health, 205-2980 Virtual Way, Vancouver, British Columbia, Canada) and a 4-13 MHz linear transducer. All measurements will be conducted by researchers who have received training in ultrasonographic imaging.
Ultrasonographic cross-sectional area of foot and ankle periarticular structuresFrom enrollment to the end of treatment at 12 weeksThe muscle cross-sectional area of the foot and ankle periarticular structures will be evaluated using ultrasonography. Ultrasonographic examinations will be performed in accordance with the EURO-MUSCULUS/USPRM foot and ankle protocols (26, 27), using a Clarius ultrasound system (Clarius Mobile Health, 205-2980 Virtual Way, Vancouver, British Columbia, Canada) and a 4-13 MHz linear transducer. All measurements will be conducted by researchers who have received training in ultrasonographic imaging.
Tone (frequency) of foot and ankle periarticular structuresFrom enrollment to the end of treatment at 12 weeksThe MyotonPro device (Myoton AS, Estonia) will be used to evaluate the muscle tone (frequency) (F) of the gastrocnemius medialis (GM),gastrocnemius lateralis (GL) , tibialis anterior (TA), peroneus longus (PL) muscles, the Achilles tendon (AT), and the plantar fascia (PF). Frequency (F) characterizes muscle tone and is reffered as Hz (Hertz). All measurements will be performed on both extremities. To ensure standardization, appropriate anatomical reference points for each structure will be marked prior to measurement
Ultrasonographic tendon morphology of foot and ankle segmentsFrom enrollment to the end of treatment at 12 weeksThe tendon morphology of the foot and ankle muscles will be evaluated using ultrasonography. Ultrasonographic examinations will be performed in accordance with the EURO-MUSCULUS/USPRM foot and ankle protocols (26, 27), using a Clarius ultrasound system (Clarius Mobile Health, 205-2980 Virtual Way, Vancouver, British Columbia, Canada) and a 4-13 MHz linear transducer. All measurements will be conducted by researchers who have received training in ultrasonographic imaging.
Stiffness of foot and ankle periarticular structuresFrom enrollment to the end of treatment at 12 weeksThe MyotonPro device (Myoton AS, Estonia) will be used to evaluate the stiffness (S) of the gastrocnemius medialis (GM),gastrocnemius lateralis (GL) , tibialis anterior (TA), peroneus longus (PL) muscles, the Achilles tendon (AT), and the plantar fascia (PF). Stiffness (S) reflects the resistance of tissue to an external force that changes its shape and is reffered as N/m (Newton/metre). All measurements will be performed on both extremities. To ensure standardization, appropriate anatomical reference points for each structure will be marked prior to measurement
The damping coefficient of foot and ankle periaticular structuresFrom enrollment to the end of treatment at 12 weeksThe MyotonPro device (Myoton AS, Estonia) will be used to evaluate the the damping coefficient (D) of gastrocnemius, tibialis anterior (TA), peroneus longus (PL) muscles, the Achilles tendon (AT), and the plantar fascia (PF). The damping coefficient (D) characterizes elasticity. All measurements will be performed on both extremities. To ensure standardization, appropriate anatomical reference points for each structure will be marked prior to measurement
Relaxation time of foot and ankle periarticular structuresFrom enrollment to the end of treatment at 12 weeksThe MyotonPro device (Myoton AS, Estonia) will be used to evaluate the Rr relaxation time of the gastrocnemius, tibialis anterior (TA), peroneus longus (PL) muscles, the Achilles tendon (AT), and the plantar fascia (PF). The relaxation time (R) of is reffered as mechanical stress and is shown as ms (milliseconds). All measurements will be performed on both extremities. To ensure standardization, appropriate anatomical reference points for each structure will be marked prior to measurement
Creep parameters of foot and ankle periarticular structuresFrom enrollment to the end of treatment at 12 weeksThe MyotonPro device (Myoton AS, Estonia) will be used to evaluate the creep (C) parameters of the gastrocnemius, tibialis anterior (TA), peroneus longus (PL) muscles, the Achilles tendon (AT), and the plantar fascia (PF). Creep (C) is defined by the ratio of relaxation time to deformation time. All measurements will be performed on both extremities. To ensure standardization, appropriate anatomical reference points for each structure will be marked prior to measurement

Secondary

MeasureTime frameDescription
Evaluation of lower extremity alignmentFrom enrollment to the end of treatment at 12 weeksLower extremity alignment will be assessed by calculating the Q angle. To evaluate the Q angle, participants will be asked to lie in the supine position with the knee joint in full extension. The Q angle will be measured using a goniometer as the angle formed between a line drawn from the anterior superior iliac spine (ASIS) to the midpoint of the patella and a line drawn from the midpoint of the patella to the tibial tuberosity, and the values will be recorded
Navicular height during weight-bearing conditionFrom enrollment to the end of treatment at 12 weeksIt is a widely used test for evaluating foot biomechanics disorders and related musculoskeletal problems, used to assess foot arch structure and pronation level (38). The navicular height will be measured in a barefoot full weight-bearing position. The vertical distance between the navicular tuberosity and the ground will be assessed.
Assessment of Hip Flexor Muscle StrengthFrom enrollment to the end of treatment at 12 weeksHip flexion muscle strength will be assessed using a hand-held dynamometer (Lafayette Instrument, Lafayette, IN). The maximal isometric strength will be recorded as Newton (N)
Assessment of BalanceFrom enrollment to the end of treatment at 12 weeksFunctional mobility and dynamic balance will be assessed using the Timed Up and Go (TUG) test. It is a simple and reliable test that is frequently used in older adults to assess an individual's mobility, balance, walking ability, and risk of falling. The Time Up Go test is commonly used in individuals who have undergone total hip arthroplasty, and it has been shown to have high test-retest reliability and good construct validity in this population
Assessment of Hip Functional StatusFrom enrollment to the end of treatment at 12 weeksHip functional status will be assessed using the Hip Outcome Score. This questionnaire consists of four main parameters assessing pain, functional status in various activities (limping, use of support, walking distance, stair climbing, putting on/taking off socks, sitting, and using public transportation), absence of deformity, and range of motion. Each parameter includes items that evaluate the respective domain, and each response option is assigned a corresponding score. At the end of the questionnaire, these scores are summed to obtain a total score. The questionnaire is scored on a scale from 0 to 100, where 90-100 is classified as excellent, 80-89 as good, 70-79 as moderate, and scores below 70 as poor.
Ankle Mobility MeasurementFrom enrollment to the end of treatment at 12 weeksAnkle mobility will be measured using a fluid-filled inclinometer and the weight-bearing lunge test (knee-to-wall test). The knee-to-wall test is a valid and reliable test that assesses joint range of motion in the closed kinetic chain of the lower extremity and provides a passive measure of ankle dorsiflexion range of motion
Assessment of Foot PostureFrom enrollment to the end of treatment at 12 weeksFoot posture will be assessed using the Foot Posture Index in a relaxed standing position, based on six criteria related to the rearfoot and forefoot. Each criterion will be scored on a scale from -2 to +2. Negative values indicate supination, while positive values indicate pronation. Total score represents overall foot posture
Assessment of KinesiophobiaFrom enrollment to the end of treatment at 12 weeksThe individuals' fear of movement or avoidance will be assessed using the Tampa Scale for Kinesiophobia (TSK). The TSK is a valid and reliable measure used to evaluate fear of physical activity and fear-avoidance beliefs related to movement. The scale is appropriate for use in individuals who have undergone total hip arthroplasty. This scale consists of 17 items rated on a 4-point Likert scale ranging from "strongly disagree" to "strongly agree." During scoring, items 4, 8, 12, and 16 are reverse scored, and a total score is then calculated. The total score ranges from 17 to 68. A score of 17 indicates no kinesiophobia, while a score of 68 indicates severe fear of movement. The cut-off value of the scale is 37; scores above 37 are considered to indicate high levels of kinesiophobia.
Assessment of the Ability to Forget the Artificial JointFrom enrollment to the end of treatment at 12 weeksThe validated Forgotten Joint Score Questionnaire (FJS-12) will be used to evaluate patients' return to daily life activities following treatment. The FJS-12 is a questionnaire consisting of 12 items that assesses joint awareness during activities of daily living using a 5-point Likert scale. For scoring, all responses are summed and divided by the total number of answered items. The resulting mean value is multiplied by 25 to transform the score to a 0-100 scale, and then subtracted from 100. Higher scores indicate the extent to which the patient is able to forget the operated side (%), reflecting better adaptation to activities of daily living.
Assessment of Fear of Falling and Confidence in Avoiding FallsFrom enrollment to the end of treatment at 12 weeksThe International Falls Efficacy Scale (FES-I) will be used to measure the participants' confidence in performing activities of daily living without fear of falling.The FES-I consists of 16 items that assess individuals' confidence in their ability to perform activities. Participants rate each item on a scale from 1 ("no concern at all") to 4 ("very concerned"), resulting in a total score ranging from 16 to 64. Higher scores indicate lower self-confidence in performing daily activities without falling
Assessment of Quality of LifeFrom enrollment to the end of treatment at 12 weeksThe SF-12 questionnaire will be used to assess participants' quality of life. In the literature, it has been used to measure the quality of life in patients who have undergone hip arthroplasty. The SF-12 consists of 12 items in total, covering questions related to two main domains: physical health and mental health. The questionnaire is scored using computer-based scoring algorithms, and higher scores indicate better health status. With this algorithm, physical health and mental health scores are calculated separately
Navicular height during non-weight-bearing conditionFrom enrollment to the end of treatment at 12 weeksIt is a widely used test for evaluating foot biomechanics disorders and related musculoskeletal problems, used to assess foot arch structure and pronation level (38). The navicular height will be measured in a non-weight-bearing position. The vertical distance between the navicular tuberosity and the ground will be assessed.
Navicular dropFrom enrollment to the end of treatment at 12 weeksIt is a widely used test for evaluating foot biomechanics disorders and related musculoskeletal problems, used to assess foot arch structure and pronation level (38). Navicular drop will be calculated by subtracting the navicular height measured during weight-bearing from the navicular height measured during non-weight-bearing condition.
Assessment of Hip Extensor Muscle StrengthFrom enrollment to the end of treatment at 12 weeksHip extensor muscle strength will be assessed using a hand-held dynamometer (Lafayette Instrument, Lafayette, IN). The maximal isometric strength will be recorded as Newton (N)
Assessment of Hip Abductor Muscle StrengthFrom enrollment to the end of treatment at 12 weeksHip abductor muscle strength will be assessed using a hand-held dynamometer (Lafayette Instrument, Lafayette, IN). The maximal isometric strength will be recorded as Newton (N)
Assessment of Hip Adductor Muscle StrengthFrom enrollment to the end of treatment at 12 weeksHip a dductor muscle strength will be assessed using a hand-held dynamometer (Lafayette Instrument, Lafayette, IN). The maximal isometric strength will be recorded as Newton (N)
Assessment of Knee Flexor Muscle StrengthFrom enrollment to the end of treatment at 12 weeksKnee flexor muscle strength will be assessed using a hand-held dynamometer (Lafayette Instrument, Lafayette, IN). The maximal isometric strength will be recorded as Newton (N)
Assessment of Knee Extensor Muscle StrengthFrom enrollment to the end of treatment at 12 weeksKnee extensor muscle strength will be assessed using a hand-held dynamometer (Lafayette Instrument, Lafayette, IN). The maximal isometric strength will be recorded as Newton (N)
Assessment of Ankle Dorsiflexor Muscle StrengthFrom enrollment to the end of treatment at 12 weeksAnkle Dorsiflexor muscle strength will be assessed using a hand-held dynamometer (Lafayette Instrument, Lafayette, IN). The maximal isometric strength will be recorded as Newton (N)
Assessment of Ankle Plantar Flexor Muscle StrengthFrom enrollment to the end of treatment at 12 weeksAnkle plantar flexor muscle strength will be assessed using a hand-held dynamometer (Lafayette Instrument, Lafayette, IN). The maximal isometric strength will be recorded as Newton (N)
Assessment of Intrinsic Foot Muscle StrengthFrom enrollment to the end of treatment at 12 weeksIntrinsic foot muscle muscle strength will be assessed using a hand-held dynamometer (Lafayette Instrument, Lafayette, IN). The maximal isometric strength will be recorded as Newton (N)
Assessment of Lower Extremity FunctionFrom enrollment to the end of treatment at 12 weeksLower extremity function will be assessed using the Lower Extremity Function Score (LEFS). It consists of 20 questions related to activities of daily living. It is used by clinicians to assess patients' baseline, progressive, and final functional status. It allows evaluation of deteriorating functional capacity in patients. For each row, the degree of ability to perform the specified function is scored from 0 to 4 across columns (0 = extreme difficulty or inability to perform the activity, 4 = no difficulty at all). The maximum possible score is 80. In our study, the LEFS (%) was calculated as: (LEFS score / 80) × 100. A low score indicates severe functional limitation, whereas a high score indicates good functional status. The minimal clinically important difference for the scale score is 9.

Countries

Turkey (Türkiye)

Contacts

CONTACTMelike N Gürel, PT, MSc.
melikenazgurel@gmail.com+905380307826
CONTACTGürsoy Coşkun, PT, PhD, Prof.
gursoycoskun@hotmail.com+905435394426
STUDY_DIRECTORGürsoy Coşkun, PT, PhD, Prof.

Hacettepe University

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jun 25, 2026