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The Effect of Exercises of Different Intensity Applied After Total Knee Arthroplasty on Exercise-Induced Hypoalgesia

The Effect of Exercises of Different Intensity Applied After Total Knee Arthroplasty on Exercise-Induced Hypoalgesia: Randomised Controlled Trial

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05781230
Enrollment
38
Registered
2023-03-23
Start date
2022-01-01
Completion date
2022-05-01
Last updated
2023-03-23

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Knee Osteoarthritis, Pain, Acute

Keywords

Total Knee Arthroplasty, Exercises intensity, pressure pain threshold, exercise-induced hypoalgesia

Brief summary

The aim of this study was to investigate whether exercise-induced hypoalgesia (EIH) is present following exercise in patient after total knee arthroplasty (TKA) and if so, if it changes with exercise intensity. A repeated measures and single-blinded randomized study were done. Thirty-eight patients 24 hours after TKA were randomly assigned to either low intensity exercises (LIE) group or high intensity exercises (HIE) group. An exercise programs lasted for five days during the hospitalization period. Pain severity was assessed by Visual Analog Scale (VAS) (0-10 mm). Pressure pain thresholds (PPTs) were measured over quadriceps and biceps brachii and muscles immediately before and after exercise.

Detailed description

Background: The aim of this study was to investigate whether exercise-induced hypoalgesia (EIH) is present following exercise in patient after total knee arthroplasty (TKA) and if so, if it changes with exercise intensity. Methods : A repeated measures and single-blinded randomized study were done. Thirty-eight patients 24 hours after TKA were randomly assigned to either low intensity exercises (LIE) group or high intensity exercises (HIE) group. An exercise programs lasted for five days during the hospitalization period. Pain severity was assessed by Visual Analog Scale (VAS) (0-10 mm). Pressure pain thresholds (PPTs) were measured over quadriceps and biceps brachii and muscles immediately before and after exercise.

Interventions

BEHAVIORALHigh Intensity Exercises Program

HIE program consisted of ankle pump exercise, Quadriceps isometric exercise, Terminal extension exercise, Passive-active assistive-active range of motion exercise, Heel sliding exercise, Straight leg raise exercise. All exercises were performed for 3 sets of 15 repetitions.

BEHAVIORALLow Intensity Exercises Program

LIE program: LIE program was similar to the HIE program. Main differences from the HIE program was repetitions of exercises. All exercises were performed by the patients for 2 sets of 8 repetitions and CPM sessions lasted each exercises session. LIE program took thirty minutes while HIE program lasted sixty minutes. Exercise intensity was monitored using the rating of perceived exertion (RPE) scale, maintaining a range between 6 and 20 RPE (16). PRE\< 8 indicates low intensity, PRE\>14 indicates high intensity

Sponsors

Hacettepe University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Subject)

Masking description

Patients were block-randomized based on intensity of exercises. The randomization sequence was produced by an external investigator using a computer-generated randomization sequence (Microsoft Excel, Microsoft, Redmond, WA, USA) to generate either a 0 or 1, corresponding with high intensity exercises or low intensity exercises, respectively

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

* Patients had undergone primary unilateral total knee replacement surgery * Patients hospitalized for at least seven days were enrolled in this study.

Exclusion criteria

* Medically stable patients who used glucocorticoids or strong analgesic drugs * Patients had post-traumatic OA, rheumatoid arthritis (RA), psoriatic arthritis, cognitive, hearing and visual problems Patients were diagnosed chronic pain condition were excluded from the study.

Design outcomes

Primary

MeasureTime frameDescription
change of pain severityadmission to hospital service to discharge from hospital service, an average 5 days. The pain severity evaluated using a visual analogue scale (VAS; scored from 0, no pain, to 100, the worst pain ever).
Change of Pressure pain thesholdadmission to hospital service to discharge from hospital service, an average 5 daysPressure pain threshold (PPTs) were assessed using a handheld pressure algo-meter

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026