Effects of ascending and descending direct current on grip strength assessed through dynamometry and myofeedback: A randomized controlled trial

Hernán Andrés De La Barra Ortiz, Jaime Opazo Cancino, Nicole Minzer Goluboff, Ghyslaing Andrade Obando, Macarena Herrera Jara, María Fernanda González Vera

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Introduction. To investigate effects of ascending and descending direct current (ADC and DD C) on muscle strength evaluated with dynamometry. Muscle strength values in kilograms were compared in 3 groups (ADC, DD C, and control) before and after galvanic electrical intervention. Methods. A randomized clinical trial was performed in the Physiotherapy Laboratory of Andres Bello University among 83 healthy volunteers. The intervention was a direct current session at an intensity of 4 mA for 12 minutes with 48-cm2 electrodes (dose: 48 mA · min;current density: 0.04 mA/cm2). The difference between the groups was galvanic therapy type applied. Current application followed a hand dynamometric test and myofeedback evaluation. The main outcome was maximum strength difference (MSdif) and its corresponding value in microvolts (μV-MSdif) obtained with myofeedback. Results. There were statistically significant changes regarding MSdif in groups who received direct current (p = 0.0001). These variations were also seen when comparing the 3 groups with the consideration of men (p = 0.0012) and women (p = 0.0021) separately. No statistically significant changes were observed in the μV-MSdif values (p = 0.9409). Conclusions. ADC can generate variations in grip strength after an intervention session, with an increase in strength of 8.9%. The increase in strength was observed both in men (6.7%) and in women (9%) of the ADC group.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalPhysiotherapy Quarterly
Volume28
Issue number2
DOIs
Publication statusPublished - 2020

Keywords

  • Electrical stimulation therapy
  • Hand strength
  • Handheld dynamometry
  • Randomized controlled trial
  • Transcutaneous electric nerve stimulation

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation

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