Test-Retest Reliability of a Submaximal Exercise Test in Patients With Hip and Knee Osteoarthritis

The aim is to evaluate the test-retest reliability of the primary care-adapted Ekblom-Bak submaximal ergometer bicycle test in patients with hip- and/or knee osteoarthritis (OA).

Forty patients with hip- and/or knee OA eligible for the Swedish national OA treatment program in primary care are to be recruited. After screening for contraindications, participants will perform the aEB-test twice within 1-2 weeks.

The investigators hypothezise that the test will demonstrate acceptable test-retest reliability in patients with hip- and/or knee OA.

To establish reliability is essential for future studies using this test in this population and may support its integration into routine clinical assessment.

Not Yet Recruiting

Trial opening soon.

Get Notified

Key information

Conditions

Osteo Arthritis Knee and Hip Arthritis Joint Diseases Musculoskeletal Diseases Osteoarthritis Osteoarthritis, Hip Osteoarthritis, Knee Rheumatic Diseases

Age range

30 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Currently listed on the waiting list for an osteoarthritis rehabilitation program due to clinically diagnosed hip and/or knee osteoarthritis.

Exclusion criteria

Another primary cause of symptoms or disability, such as inflammatory joint disease or fracture.
Another condition currently causing more symptoms than osteoarthritis, for example fibromyalgia.
Insufficient understanding of written and spoken Swedish.
Medication that affects heart rate.
Contraindications for a submaximal ergometer bicycle test according to the screening protocol, such as heart disease.

Treatment and study plan

Submaximal cycle ergometer test-retest

Procedure

Performing a submaximal cycle ergometer test twice

Primary outcomes

Estimated VO2-max value.

Time frame: Time between first and second submaximal cycle ergometer test should be one week.

An estimated VO2-max value is obtained by performing the Ekblom Bak submaximal cycle ergometer test.

Study contacts

Contact information is provided by the study sponsor or research team.

Daniel Karsberg Zotterman, MSc

CONTACT

[email protected]

+46739298119

Stefan Lundqvist, PhD

CONTACT

[email protected]

+46762276179

Sponsors and collaborators

Lead sponsor

Vastra Gotaland Region

Other Gov

Registry information

Official study title

Test-Retest Reliability of a Submaximal Exercise Test in Patients With Hip- and/or Knee Osteoarthritis

Important dates

Study start: 2026
Primary completion: 2027
Study completion: 2027
First posted: Feb 3, 2026
Registry last updated: Feb 6, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

Recruiting