Acute effects of whole body vibration on directionality and reaction time latency of trunk muscles: the importance of rest and implications for spine stability.
J Electromyogr Kinesiol
; 23(2): 394-401, 2013 Apr.
Article
em En
| MEDLINE
| ID: mdl-23218963
ABSTRACT
Workplace exposure to whole body vibration (WBV) has been identified as one of the major physical risk factors encountered by the population. There are indications that, subsequent to a perturbation, impaired reflex response could allow for destabilization of the spine, possibly leading to injury. The purpose of this study was to investigate if WBV alters reflex response of trunk muscles and if the direction of perturbation (flexion or extension or lateral) and delay between exposure and perturbation influences the response. The results indicate that EMG latency was increased more in the vibration condition than in sitting without vibration. Significant effects with respect to directionality were observed in Erector Spinae muscles. The EMG latency reduced from the effect of perturbation after a 20s rest period. Even though the EMG latency did not fully return to its Pre-test state, the present results still show that recovery from the acute effects of WBV is possible with a rest period.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Estimulação Física
/
Tempo de Reação
/
Coluna Vertebral
/
Músculo Esquelético
/
Equilíbrio Postural
/
Tronco
/
Contração Muscular
Tipo de estudo:
Prognostic_studies
/
Risk_factors_studies
Limite:
Adult
/
Humans
/
Male
Idioma:
En
Revista:
J Electromyogr Kinesiol
Assunto da revista:
FISIOLOGIA
Ano de publicação:
2013
Tipo de documento:
Article
País de afiliação:
Canadá