Validity and Reliability of Calf Raise Tests in Patients With Achilles Tendon Rupture and Lateral Ankle Sprain

NCT07197593 | Not Yet Recruiting

• 1 other identifier: 2025-01043
• Study Type: interventional
• Target: 70
• Locations: 0 countries
• Sites: N/A

Brief Summary

This study aims to evaluate the validity and reliability of clinically used Calf Raise Test parameters (collected with the "the Calf Raise App") between patients with Lateral Ankle Sprain or Achilles Tendon Repair and healthy controls.

Conditions

Achilles Tendon; Ankle Sprain

Outcome Measures

Primary Outcomes (1)

• Calf Raise Test (CRT)

  The CRT (evaluated by the use of the CRT App) yields three different variables of interest: * Concentric power CRT: peak power (W) during the ascending phase * Eccentric-concentric power CRT: peak power (W) during the ascending phase * Endurance CRT: number of repetitions (n), total positive work (W), and total positive displacement (cm)

  The CRT data will be collected at two time points: at baseline and after a 30- min break. Total time of data collection: ca. 1 hour.

Secondary Outcomes (6)

• Patient-reported outcome measures (PROM) - FAOS

  This PROM data will be collected at one time point: at baseline.

• Patient-reported outcome measure (PROM) - ATRS

  This PROM data will be collected at one time point: at baseline.

• Patient-reported outcome measure (PROM) - FFI

  This PROM data will be collected at one time point: at baseline.

• Patient-reported outcome measure (PROM) - FAAM

  This PROM data will be collected at one time point: at baseline.

• Patient-reported outcome measure (PROM) - UCLA Activity Score

  This PROM data will be collected at one time point: at baseline.

Study Arms (1)

Calf Raise Test (CRT) App

OTHER

The validated CRT App allows to accurately measure work, power and peak height in in individuals performing the calf raise test.

Other: Calf Raise Test

Interventions

Calf Raise Test OTHER

The study participants perform three single-leg CRTs (tracked by the CRT App) in a fixed sequence: concentric power, eccentric-concentric power and endurance. ATRC/LAS Individuals start with the affected leg, healthy participants with the dominant leg.

Calf Raise Test (CRT) App

Eligibility Criteria

• Age: 18 Years - 65 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Signed informed consent
• Aged 18-65 years
• German or English speaking
• LAS individuals: Unilateral LAS 4-16 weeks post-injury diagnosed by a physician as LAS, supination trauma, ankle distortion or ligamentous ankle injury.
• ATR individuals: Unilateral ATR 6- 24 months post-injury/surgery (surgical or conservative treatment).
• Healthy controls: Matched to Patients by Group Level: Physical Activity, Age and Gender.

You may not qualify if:

• LAS individuals: Medial Ligament injuries (Grade II or III) ATR individuals: Previous ATR
• Chronic Ankle Instability (defined by symptoms such as giving way, perceived instability and at least one LAS within the last 6 months)
• Previous ATR
• Other lower limb injury and/or surgery in the last year (e.g. fractures, ligament reconstructions or other conditions resulting in ≥ 6 months of sports inactivity)
• Impaired motor function of the lower limb due to neurovascular or neurological diseases
• Vestibular or visual disturbances
• Or any other pathoanatomic abnormality that would affect motor performance (e.g. foot arthrodesis, toe amputation/missing toes or other conditions such as joint deformities, severe chronic pain).

Sponsors & Collaborators

• Schulthess Klinik: lead

MeSH Terms

Conditions

Ankle Injuries

Condition Hierarchy (Ancestors)

Leg Injuries; Wounds and Injuries

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: NONE
• Purpose: SCREENING
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Head of Research Group, Human Performance Lab

Model Details: Validity and reliability study

Study Record Dates

• First Submitted: September 5, 2025
• First Posted: September 29, 2025
• Study Start: October 1, 2025
• Primary Completion: March 31, 2026
• Study Completion (Estimated): May 31, 2026
• Last Updated: September 29, 2025

Record last verified: 2025-09

Data Sharing

• IPD Sharing: Will not share