448 kHz capacitive resistive monopolar radiofrequency: The procedure will consist of a 20-minute radiofrequency session on the Achilles tendon, applying 10 minutes in capacitive mode and 10 minutes in resistive mode. The device has a maximum peak power of 200 W and 450 V. Both modes will be administered as a hyperthermia dose, adjusted according to the patient's subjective perception of heat, with a target of 8/10. The application will be performed longitudinally on the Achilles tendon, from proximal to distal and from distal to proximal, measuring the variables before and after the procedure. In resistive mode, continuous wave will be used, and the return electrode will be a plate placed under the patient's abdomen. The entire procedure will be carried out following the manufacturer's instructions.
Study summary
448 kHz capacitive-resistive monopolar radiofrequency is an emerging physiotherapy technique whose usefulness and clinical relevance still need to be investigated. This study is a pre-post quasi-experimental study in which several variables will be measured before and immediately after 448 kHz capacitive resistive monopolar radiofrequency. It aims to analyze the morphological and mechanical changes in the Achilles tendon following the intervention in healthy runners.
Eligibility
Sex
ALL
Min age
18 Years
Max age
65 Years
Healthy volunteers
Accepted
Inclusion Criteria:
* Adults aged 18-65
* Runners with at least one year of regular practice.
* Must not have suffered any ligament, bone, tendon, or muscle injury in the lower limb or lumbar region during the last year.
Exclusion Criteria:
* History of lower limb surgery, rheumatic or neuromuscular diseases or pregnancy
* Contraindication for radiofrecuency treatment.
* Athletes with visual, auditory, or any other impairment that may affect their cognitive ability to understand the test.
Primary outcome measure(s)
Achilles tendon thickness (mm) measured by B-mode ultrasound — 1 hour The Achilles tendon will be assessed with the participant in a prone position, legs extended and feet resting over the edge of the examination couch. Ultrasound images will be acquired using a linear transducer in the long axis of the tendon, at the level of the medial malleolus, in order to reduce bone-related artefacts. B-mode ultrasound will be used for the evaluation.
Elastography in Achilles tendon — 1 hour Tendon stiffness and elasticity were assessed using compression elastography. Color-coded elastographic maps and quantitative tissue deformation values were obtained following standardized procedures previously described in the literature. Measurements were performed at the same procedure used for measuring tendon thickness.
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
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