Testing the Reliability of Kinovea Video Analysis Software in Measuring Knee and Hip Angles During Sit-to-Stand Tasks

Reliability of Kinovea for Knee and Hip Angle Measurements During Sit-to-Stand

The purpose of this study is to evaluate the intra-observer and inter-observer reliability of the Kinovea video analysis software in measuring knee and hip angles during the sit-to-stand movement. Participants will perform sit-to-stand tasks while being video-recorded. The recorded movements will be analyzed using the Kinovea software to determine the consistency and reliability of joint angle measurements.

Study Overview

• Status: Not yet recruiting
• Conditions: Healthy Volunteers; Biomechanical Phenomena

• Study Type: Observational
• Enrollment (Estimated): 35

Contacts and Locations

• Study Contact: Name: Sevilay Seda BAŞ, PhD; Phone Number: +90 (312) 906 1683; Email: ssbas@aybu.edu.tr

Study Locations

• Turkey (Türkiye)
  • Ankara, Turkey (Türkiye)
    • Ankara Yıldırım Beyazıt University
    • Contact: Sevilay Seda BAŞ, PhD; Phone Number: +90 (312) 906 1683; Email: ssbas@aybu.edu.tr

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: Yes

• Sampling Method: Non-Probability Sample

Study Population

The study population consists of volunteer students recruited from the Ankara Yildirim Beyazit University, Department of Physiotherapy and Rehabilitation at the Faculty of Health Sciences.

Description

Inclusion Criteria:

• Be between the ages of 18 and 45
• Have a body mass index (BMI) between 18 and 25 kg/m²
• Be able to sit down and stand up independently
• Be a volunteer

Exclusion Criteria:

• Having previously undergone lower extremity and spinal surgery
• Having a neurological, orthopedic, or vestibular condition that may affect balance and muscle strength
• Having sustained a lower extremity and/or spinal injury within the last 6 months
• Having spinal problems such as scoliosis or lumbar disc herniation
• Having congenital orthopedic problems such as hemimelia, dysmelia, or leg length discrepancy
• Being pregnant

Study Plan

How is the study designed?

Number of groups / cohorts

1

Cohorts and Interventions

Group / Cohort
Healthy Adults; The study consists of a single group. This group will comprise healthy individuals who meet the predefined inclusion and exclusion criteria.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Hip Flexion	Participants will perform a sit-to-stand task using a standard chair while lower extremity movements are recorded with a camera. The recorded videos will be transferred to the Kinovea software for the measurement of hip joint angles. To facilitate angle calculation, anatomical landmarks including the greater trochanter, the longitudinal axis of the trunk, and the midpoint of the thigh will be marked on the participant's clothing. Hip joint angles will then be analyzed using the angle measurement tool available in the software. Measurements will be performed independently by three physiotherapists at one-week intervals.	At baseline (single video recording session)
Knee Flexion	Participants will perform a sit-to-stand task using a standard chair while lower extremity movements are recorded with a camera. The recorded videos will be transferred to the Kinovea software for knee joint angle analysis. To calculate knee joint angles, anatomical landmarks including the greater trochanter, lateral femoral condyle, and lateral malleolus will be marked on the participant's clothing. Knee joint angles will then be analyzed using the angle measurement tool within the software. Measurements will be performed independently by three physiotherapists at one-week intervals.	At baseline (single video recording session)

Collaborators and Investigators

• Sponsor: Ankara Yildirim Beyazıt University

Study record dates

Study Major Dates

• Study Start (Estimated): June 29, 2026
• Primary Completion (Estimated): July 20, 2026
• Study Completion (Estimated): July 20, 2026

Study Registration Dates

• First Submitted: June 24, 2026
• First Submitted That Met QC Criteria: June 24, 2026
• First Posted (Actual): June 30, 2026

Study Record Updates

• Last Update Posted (Actual): June 30, 2026
• Last Update Submitted That Met QC Criteria: June 24, 2026
• Last Verified: June 1, 2026

More Information

Terms related to this study

• Keywords: Reliability; Inter-rater reliability; Intra-rater reliability; Hip joint; Knee joint; Sit-to-stand; Kinovea; Video analysis; Joint angles
• Other Study ID Numbers: 01/31

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO
• IPD Plan Description: To protect participant privacy and because explicit consent for data sharing was not obtained.

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No