Current evidence demonstrates similar effects of kilohertz-frequency and low-frequency current on quadriceps evoked torque and discomfort in healthy individuals: a systematic review with meta-analysis.

Autor: da Silva VZ; a Division of Physical Therapy , Hospital de Base do Distrito Federal , Brasilia , Brazil ., Durigan JL; b Division of Physical Therapy - Ceilandia College , University of Brasilia , Brasilia , Brazil ., Arena R; c Department of Physical Therapy , College of Applied Health Sciences, University of Illinois Chicago , Chicago , IL , USA ., de Noronha M; d Department of Allied Health , Faculty of Health Sciences, La Trobe University , Bendigo , Australia , and., Gurney B; e Division of Physical Therapy , Department of Orthopaedics and Latin American and Iberian Institute, University of New Mexico , Albuquerque , NM , USA., Cipriano G Jr; b Division of Physical Therapy - Ceilandia College , University of Brasilia , Brasilia , Brazil .
Jazyk: angličtina
Zdroj: Physiotherapy theory and practice [Physiother Theory Pract] 2015; Vol. 31 (8), pp. 533-9. Date of Electronic Publication: 2015 Oct 14.
DOI: 10.3109/09593985.2015.1064191
Abstrakt: Background: Neuromuscular electrical stimulation (NMES) is widely utilized to enhance muscle performance. However, the optimal NMES waveform with respect to treatment effect has not been established.
Objective: To investigate the effects of kilohertz-frequency alternating current (KFAC) and low-frequency pulsed current (PC) on quadriceps evoked torque and self-reported discomfort.
Data Sources: PubMed, The Cochrane Library, EMBASE, MEDLINE, Physiotherapy Evidence Database (PEDro), SinoMed, ISI Web of Knowledge, and CINAHL were searched for randomized controlled trials (RCTs) and quasi-randomized controlled trials (QRCTs).
Study Selection: Two reviewers independently selected potential studies according to the inclusion criteria, extracted data, and assessed methodological quality.
Data Extraction and Synthesis: Studies were eligible if they compared KFAC versus PC interventions. Studies that included outcome measures for percentage of maximal isometric voluntary contraction (%MIVC) torque and self-reported discomfort level were eligible for evaluation. Seven studies involving 127 individuals were included. The methodological quality of eligible trials was moderate, with a mean of 5 on the 10-point PEDro scale. Overall, PC was no better than KFAC in terms of evoked torque and there was no difference in self-reported discomfort level.
Conclusion: KFAC and PC have similar effects on quadriceps evoked torque and self-reported discomfort level in healthy individuals. The small number and overall methodological quality of currently available studies included in this meta-analysis indicate that new RCTs are needed to better determine optimal NMES treatment parameters.
Databáze: MEDLINE
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