Exercise With Blood Flow Restriction in Knee Osteoarthritis

Not Applicable

Completed

• Conditions: Knee Osteoarthritis
• Interventions: Other: BFR resistance exercise

• Registration Number: NCT05274932
• Lead Sponsor: University of Valencia

Brief Summary

The purpose of this study is to evaluate the neuromuscular responses, pain intensity and rate of perceived exertion in patients with severe knee osteoarthritis in a preoperative setting with low-load resistance training with blood flow restriction at different levels of arterial occlusion pressure.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2022-02-15
• Study First Submitted QC: 2022-03-05
• Study First Posted: 2022-03-11
• Study Start: 2022-03-21
• Status Verified: 2022-05
• Primary Completion: 2022-05-13
• Study Completion: 2022-05-20
• Last Update Submitted: 2022-05-23
• Last Update Posted: 2022-05-24

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 22

Inclusion Criteria

• men and women above 55 years old.
• diagnosed with severe knee osteoarthritis.
• scheduled for unilateral TKA surgery in a local hospital during 2021- 2022.

Exclusion Criteria

• pain in the contralateral limb (maximum pain, ≥80 of 100 mm on a VAS during daily activities).
• another hip or knee joint replacement in the previous year.
• any medical condition in which exercise was contraindicated.
• participated in exercise programs (>2 days/week, training at intensities of 10-15RM) in the 6 months prior to the study.
• history of stroke, brain surgery, major depression, or any self-perceived cognitive alterations that could affect the performance of dual tasks.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
BFR at 80% AOP	BFR resistance exercise	Knee extensions with 30% 1RM and BFR at 80% AOP.
Placebo	BFR resistance exercise	Knee extensions with 30% 1RM and no occlusion pressure.
BFR at 40% AOP	BFR resistance exercise	Knee extensions with 30% 1RM and BFR at 40% AOP.

Primary Outcome Measures

Name	Time	Method
Self-reported pain intensity (Visual Analogue Scale (VAS) Scale 0-10)	Pre exercise, immediate post set, immediate post session, and 10 minutes after session.	Change from baseline to the end of the session, and the change between the treatment group and the placebo group.
HDsEMG	During each experimental session and during each exercise condition.	Change between baseline and exercise, and the change between the treatment group and the placebo group.
Pressure pain thresholds	Pre exercise, immediate post session, and 10 minutes after session.	Change from baseline to the end of the session, and the change between the treatment group and the placebo group.

Secondary Outcome Measures

Name	Time	Method
Tampa Scale of Kinesiophobia (TSK 11)	Pre session.	Its score range is 11-44, with higher scores reflecting worse condition.
Chronic Pain Self-Efficacy Scale (CPSS)	Pre session.	The Chronic Pain Self-Efficacy Scale (CPSS) is designed to measure chronic pain patients' perceived self-efficacy to cope with the consequences of chronic pain. The CPSS measures three domains of pain self-efficacy: pain management, physical functioning, and coping with symptoms. A total score is yielded (ranging from 220-2200), with higher scores reflecting a better condition.
Pain Catastrophizing Scale (PCS)	Pre session.	People are asked to indicate the degree to which they have certain thoughts and feelings when they are experiencing pain using the 0 (not at all) to 4 (all the time) scale. A total score is yielded (ranging from 0-52), along with three subscale scores assessing rumination, magnification and helplessness, with higher scores reflecting worse condition.
Heart Rate	Pre exercise, immediate post set, immediate post session, and 10 minutes after session.	Change from baseline to the end of the session, and the change between the treatment group and the placebo group.
WOMAC questionaire for patients with hip or knee osteoarthritis.	Pre session.	The WOMAC is a disease-specific self-administered questionnaire for patients with hip or knee osteoarthritis. It has a multidimensional scale made up of 24 items grouped into three dimensions: pain (5 items), stiffness (2 items) and physical function (17 items). For each item, it uses a Likert scale with five response levels, representing different degrees of intensity (none, mild, moderate, severe or extreme) that are scored from 0 to 4. The final score for the WOMAC is determined by adding the aggregate scores for pain, stiffness and function. The higher the score, the worse the patient's condition.
Rating of perceived exertion (RPE) based on Borg's CR10 scale	Immediate post exercise.	The Borg CR10 scale is a tool for measuring an individual's effort and exertion during physical work. It is a very simple numerical list from 0 (no exertion at all) to 10 (maximal intensity of activity). Participants are asked to rate their exertion on the scale during the activity, combining all sensations and feelings of physical stress and fatigue. They are told to disregard any one factor such as leg pain or shortness of breath but to try to focus on the whole feeling of exertion.

Trial Locations

Locations (1)

Clinic Universitary Hospital of Valencia; 🇪🇸 Valencia, Spain