Investigation of Vision on Knee Joint Velocity Sense in Healthy Adults

NCT07437066 | Completed

• 1 other identifier: 13866/25/ΤΦΣΚΘ
• Study Type: observational
• Target: 60
• Locations: 1 country
• Sites: 1

Brief Summary

The study included two tasks to test how well people could reproduce the speed of knee movement at two different speeds (20°/s and 120°/s) under two vision conditions: eyes closed and eyes open. It included 10 participants. The equipment used was a Biodex 4 Pro dynamometer, an eye mask, and a goniometer. Participants wore shorts so that the knee area was free for the measurements. Before starting, each participant's height, weight, age, and sex were recorded. All measurements were done while sitting. The order of the tests was random. Each participant chose the first four letters of the alphabet at random, and each letter matched a combination of speed and vision condition (A: eyes closed, B: eyes open, C: 120°/s, D: 20°/s). For the eyes-closed condition, participants wore the eye mask. The tests were conducted in a quiet room to help participants focus. First, the knee was moved passively by the machine so participants could feel the speed. Then, they tried to reproduce the same speed themselves. The 20°/s tests had 5 repetitions, and the 120°/s tests had 8 repetitions. The whole session lasted about 20 minutes. Participants tried to stay focused, and at the end of each condition, they rated their attention using a simple 10-point scale.

Conditions

Proprioception; Vision

Keywords

proprioception; vision; velocity replication

Outcome Measures

Primary Outcomes (1)

• Αbsolute error of target velocity under the two conditions

  Participants' ability to reproduce the speed of knee movement at two velocities (20°/s and 120°/s) under eyes open and eyes closed conditions, measured with a Biodex 4 Pro dynamometer.

  single session ( 20 minutes)

Eligibility Criteria

• Age: 18 Years - 25 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)
• Sampling Method: Non-Probability Sample

Study Population

60 healthy adults participated in the study. Participants were aged 18-25 years, included both males and females (30 male - 30 female), and had no history of knee injuries. All measurements were performed in a controlled laboratory environment.

You may qualify if:

• young, healthy adults

You may not qualify if:

• knee pain or knee disorder, or knee surgery, neurological diseases, heart diseases, respiratory diseases

Sponsors & Collaborators

• University of Thessaly: lead

Study Sites (1)

Physiotherapy Department, University of Thessaly

Lamia, Fthiotis, 35132, Greece

Location

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: CROSS SECTIONAL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: PhD candidate, Physiotherapy Department, University of Thessaly

Study Record Dates

• First Submitted: February 20, 2026
• First Posted: February 27, 2026
• Study Start: May 15, 2025
• Primary Completion: June 13, 2025
• Study Completion: June 20, 2025
• Last Updated: February 27, 2026

Record last verified: 2026-02

Locations

GR (1)