An interventional study of Pulsed electromagnetic field therapy and Sham treatment in Knee Range-of-motion and Quadriceps Muscle Stiffness, sponsored by Chinese University of Hong Kong. Completed at 1 site in Hong Kong. Open to participants aged 18 Years to 40 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2024-02-02.
Sponsored by Chinese University of Hong Kong · Not applicable, Interventional, and Prevention
The goal of this clinical trial is to assess the effectiveness of pulsed electromagnetic field therapy as an adjunct to warm-up exercises, in healthy participants. Researchers will investigate both the immediate effect of one round of pulsed electromagnetic field therapy (PEMF) and after a warm-up exercise, on participants' range-of-motion (ROM) at the knee and quadriceps' muscle stiffness, measured through shear wave elastography, an ultrasound technique. This may be useful in future interventions to protect against sports injuries.
Participants will have their knee ROM and quadriceps' muscle stiffness measured thrice, once at baseline, once after PEMF/sham treatment, and once after 5 minutes of warm-up stationary bike exercises.
Researchers will compare with sham treatment to see if there are any significant effects from PEMF therapy.
The goal of this clinical trial is to assess the effectiveness of pulsed electromagnetic field therapy as an adjunct to warm-up exercises, in healthy participants. Researchers will investigate both the immediate effect of one round of pulsed electromagnetic field therapy (PEMF) and after a warm-up exercise, on participants' range-of-motion (ROM) at the knee and quadriceps' muscle stiffness, measured through shear wave elastography, an ultrasound technique. This may be useful in future interventions to protect against sports injuries.
Participants will have their knee ROM and quadriceps' muscle stiffness measured thrice, once at baseline, once after PEMF/sham treatment, and once after 5 minutes of warm-up stationary bike exercises.
Researchers will compare with sham treatment to see if there are any significant effects from PEMF therapy.
Chinese University of Hong Kong is the lead sponsor of 1,419 studies on the registry; 487 are open to participants now.
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Participants receive PEMF therapy. During this, the participant is seated with their right leg extended and with the bore of the PEMF machine between their knee and hip joints, with their left leg at rest. PEMF was applied at 1 mT, 15 Hz for 10 minutes.
Device: Pulsed electromagnetic field therapy
Participants receive sham therapy, where the PEMF machine does not apply the pulsed electromagnetic waves. However, during this, the participant is kept in the same position as those in the treatment arm.
Device: Sham treatment
Pulsed electromagnetic field therapy for 10 minutes, using a PEMF device, at 1 mT, 15 Hz.
Sham treatment, using the same PEMF device
Change in knee range-of-motion from baseline immediately after PEMF and after warm-up exercise, as assessed by goniometer
A goniometer will be used to measure the knee range-of-motion: the static arm will follow a line joining the knee to the greater trochanter of the femur, and the moving arm a line from the knee to the lateral malleolus of the ankle
Time frame: From before PEMF/sham treatment to end of treatment and warm-up exercise, within 1 hour
Change in quadriceps muscle stiffness from baseline immediately after PEMF and after warm-up exercise, as assessed by ultrasound shear wave elastography
Ultrasound imaging and shear wave elastography will be used to measure the stiffness of the three superficial quadriceps muscles (vastus medialis, vastus lateralis and rectus femoris). Markings will be made to standardise the position of scanning. Ultrasound imaging will be used to verify the muscle being scanned. After shear wave is applied and a stable image is obtained, Young's modulus will be measured as a measure of muscle stiffness.
Time frame: From before PEMF/sham treatment to end of treatment and warm-up exercise, within 1 hour
Plan to share: No
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Chinese University of Hong Kong