NCT07648199

Brief 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.

Trial Health

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Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
19

participants targeted

Target at below P25 for not_applicable

Timeline
1mo left

Started Jul 2026

Shorter than P25 for not_applicable

Geographic Reach
1 country

1 active site

Status
not yet recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

First Submitted

Initial submission to the registry

June 9, 2026

Completed
6 days until next milestone

First Posted

Study publicly available on registry

June 15, 2026

Completed
16 days until next milestone

Study Start

First participant enrolled

July 1, 2026

Expected
29 days until next milestone

Primary Completion

Last participant's last visit for primary outcome

July 30, 2026

Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

July 30, 2026

Last Updated

June 15, 2026

Status Verified

June 1, 2026

Enrollment Period

29 days

First QC Date

June 9, 2026

Last Update Submit

June 9, 2026

Conditions

Achilles Tendon InjuryAchilles Tendon

Keywords

Achilles tendonRadiofrecuencyPhysiotherapy

Outcome Measures

Primary Outcomes (2)

  • Achilles tendon thickness (mm) measured by B-mode ultrasound

    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.

    1 hour

  • Elastography in Achilles tendon

    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.

    1 hour

Secondary Outcomes (2)

  • Plantar flexion strength

    1 hour

  • Functionality of the lower limb

    1 hour

Study Arms (1)

Radiofrecuency in tendon achilles

EXPERIMENTAL

Monopolar capacitive-resistive radiofrequency (CRMR) at 448 kHz. Applied with the objective of hyperthermia (thermal effect).

Device: 448 kHz capacitive resistive monopolar radiofrequency

Interventions

448 kHz capacitive resistive monopolar radiofrequencyDEVICE

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.

Radiofrecuency in tendon achilles

Eligibility Criteria

Age18 Years - 65 Years
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • 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.

You may not qualify if:

  • History of lower limb surgery, rheumatic or neuromuscular diseases, pregnancy, or any other contraindication for radiofrecuency treatment.
  • Individuals with visual, auditory, or any other impairment that may affect their cognitive ability to understand the test.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Clínica Gómez Requena

Vélez-Málaga, Malaga, Spain

Location

Central Study Contacts

José Daniel Gómez-Requena, PT

CONTACT

34 686305704danielgomezrequena@gmail.com

Study Design

Study Type
interventional
Phase
not applicable
Allocation
NA
Masking
NONE
Purpose
HEALTH SERVICES RESEARCH
Intervention Model
SINGLE GROUP
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
PhD, PT

Study Record Dates

First Submitted

June 9, 2026

First Posted

June 15, 2026

Study Start (Estimated)

July 1, 2026

Primary Completion (Estimated)

July 30, 2026

Study Completion (Estimated)

July 30, 2026

Last Updated

June 15, 2026

Record last verified: 2026-06

Locations

ES(1)