Skinfold thickness affects the isometric knee extension torque evoked by Neuromuscular Electrical Stimulation
Braz. j. phys. ther. (Impr.)
;
19(6): 466-472, Nov.-Dec. 2015. tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-767069
ABSTRACT
BACKGROUND:
Subcutaneous adipose tissue may influence the transmission of electrical stimuli through to the skin, thus affecting both evoked torque and comfort perception associated with neuromuscular electrical stimulation (NMES). This could seriously affect the effectiveness of NMES for either rehabilitation or sports purposes.OBJECTIVE:
To investigate the effects of skinfold thickness (SFT) on maximal NMES current intensity, NMES-evoked torque, and NMES-induced discomfort.METHOD:
First, we compared NMES current intensity, NMES-induced discomfort, and NMES-evoked torque between two subgroups of subjects with thicker (n=10; 20.7 mm) vs. thinner (n=10; 29.4 mm) SFT. Second, we correlated SFT to NMES current intensity, NMES-induced discomfort, and NMES-evoked knee extension torque in 20 healthy women. The NMES-evoked torque was normalized to the maximal voluntary contraction (MVC) torque. The discomfort induced by NMES was assessed with a visual analog scale (VAS).RESULTS:
NMES-evoked torque was 27.5% lower in subjects with thicker SFT (p=0.01) while maximal current intensity was 24.2% lower in subjects with thinner SFT (p=0.01). A positive correlation was found between current intensity and SFT (r=0.540, p=0.017). A negative correlation was found between NMES-evoked torque and SFT (r=-0.563, p=0.012). No significant correlation was observed between discomfort scores and SFT (rs=0.15, p=0.53).CONCLUSION:
These results suggest that the amount of subcutaneous adipose tissue (as reflected by skinfold thickness) affected NMES current intensity and NMES-evoked torque, but had no effect on discomfort perception. Our findings may help physical therapists to better understand the impact of SFT on NMES and to design more rational stimulation strategies.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Dobras Cutâneas
/
Músculo Esquelético
/
Estimulação Elétrica
/
Músculo Quadríceps
/
Contração Isométrica
Limite:
Humanos
Idioma:
Inglês
Revista:
Braz. j. phys. ther. (Impr.)
Assunto da revista:
MEDICINA FISICA E REABILITACAO
Ano de publicação:
2015
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade de Brasília/BR
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