Possibility of a Novel Warm-Up Strategy Using Capacitive and Resistive Electric Transfer: A Pilot Study

Abstract

Purpose] Capacitive and resistive electric transfer (CRET) is becoming prevalent in sports settings. CRET is effective for improving pain and healing injured tissue; however, its influence on muscle function and morphology is still unclear. This study confirmed the immediate effects of CRET on the duration of muscular stiffness and range of motion (ROM). [Method] This study describes the protocol for a single-arm trial with the non-blinding of participants and researchers. Twenty-four healthy men participated in the study. They received CRET therapy for their low back areas. The muscular stiffness of the multifidus muscle (superficial and deep) and the ROM using the active straight leg raise (ASLR) test were measured pre-intervention, post-intervention (immediately), and 15 and 30 min post-intervention. We compared these parameters using a one-way analysis of variance and Dunnett's test (multiple comparison tests for subtests). [Results] The muscular stiffness of the superficial and deep multifidus muscles was significantly decreased, and the ASLR test showed a significant increase compared with the test performed pre-intervention. In addition, these effects persisted for 30 min.[Conclusion] Warm-up is vital for improving muscular stiffness and increasing the ROM. CRET is a useful device for achieving these aims, particularly as a passive warm-up method in sports settings.

The application of a single session of capacitive resistive electric transfer 24 h before exercise modifies the accelerometric pattern in standardbred racing trotters

“…The timing of the application of CRET before exercise might be critical and the effect of different periods/ protocols of applications have not been evaluated yet. A recent article has evaluated the effects of CRET therapy as a warm-up strategy before exercise [ 28 ]. Although the authors documented its usefulness as a procedure to reduce muscle stiffness, they did not evaluate its effect on performance and recommended an active warm-up afterward.…”

The Thermal Influence of an Electromagnetic Field with a Radio Frequency Depending on the Type of Electrode Used

“…Despite there being relatively few scientific studies, work at low frequencies (<1 MHz) is used in clinical practice, with the goal of obtaining an increase in tissue temperature as well as other physiological effects. Among the electrophysical factors used in medicine, a wide range of frequencies is used, ranging from 30 kHz to 30 MHz [ 1 , 2 , 3 ]. The factors inducing hyperthermia include the following [ 1 , 4 , 5 ]: Long-wave diathermy—from 3 to 300 kHz (however, this is considered obsolete due to the presence of numerous practical limitations); Short-wave diathermy—from 3 to 30 MHz; Microwaves—from 300 to 3000 MHz (rarely used today).…”