Surface EMG and torsion measurements during snow skiing: Laboratory and field tests

J. K. Louie, C. Y. Kuo, M. D. Gutierrez, C. D. Mote

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


The relationship between mean rectified EMG (MREMG) measured with surface electrodes and the longitudinal torsion of the lower extremity was investigated in laboratory and snow skiing experiments. Linear regression of the MREMG from the gluteus medius and the peroneus longus with the torsion measured at the foot in the laboratory tests showed that torsion can be predicted with correlation coefficients greater than 0.95 and with a standard deviation less than 5 Nm over all knee flexions and weight bearing. A similar correspondence between MREMG and torsion during skiing does not exist. MREMG is dominantly correlated to posture and body position control functions in skiing. During falling, during ski binding release, and during possible injury sustaining situations, the MREMG was always relatively large, but it was not distinguishable from that associated with smaller torsion of the lower extremity.

Original languageEnglish (US)
Pages (from-to)713-719,721-724
JournalJournal of Biomechanics
Issue number10
StatePublished - 1984
Externally publishedYes

ASJC Scopus subject areas

  • Biophysics
  • Orthopedics and Sports Medicine
  • Biomedical Engineering
  • Rehabilitation


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