Title:	Effects of Kilohertz Effects of kilohertz frequency, burst duty cycle, and burst duration on evoked torque, perceived discomfort and muscle fatigue : a systematic review
Authors:	Modesto, Karenina Arrais Guida Bastos, Júlia Aguillar Ivo Vaz, Marco Aurélio Durigan, João Luiz Quagliotti
Assunto::	Estimulação elétrica Torque Fadiga muscular
Issue Date:	2023
Publisher:	Wolters Kluwer Health
Citation:	Effects of kilohertz frequency, burst duty cycle, and burst duration on evoked torque, perceived discomfort and muscle fatigue: a systematic review. American Journal of Physical Medicine & Rehabilitation, v. 102, n. 2, p 175-183, fev. 2023. DOI: 10.1097/PHM.0000000000001982.
Abstract:	Kilohertz-frequency alternating current is used to minimize muscle atrophy and muscle weakness and improve muscle performance. However, no systematic reviews have evaluated the best Kilohertz-frequency alternating current parameters for this purpose. We investigated the effects of the carrier frequency, burst duty cycles, and burst durations on evoked torque, perceived discomfort, and muscle fatigue. A search of eight data sources by two independent reviewers resulted in 13 peer-reviewed studies being selected, following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, and rated using the PEDro scale to evaluate the methodological quality of the studies. Most studies showed that carrier frequencies up to 1 kHz evoked higher torque, while carrier frequencies between 2.5 and 5 kHz resulted in lower perceived discomfort. In addition, most studies showed that shorter burst duty cycles (10%–50%) induced higher evoked torque and lower perceived discomfort. Methodological quality scores ranged from 5 to 8 on the PEDro scale. We conclude that Kilohertz-frequency alternating current develops greater evoked torque for carrier frequencies between 1 and 2.5 kHz and burst duty cycles less than 50%. Lower perceived discomfort was generated using Kilohertz-frequency alternating currents between 2.5 and 5 kHz and burst duty cycles less than 50%.
metadata.dc.description.unidade:	Faculdade UnB Ceilândia (FCE) Curso de Fisioterapia (FCE-FISIO)
DOI:	10.1097/PHM.0000000000001982
Appears in Collections:	Artigos publicados em periódicos e afins

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