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|Long-term stability of tensiomyography measured under different muscle conditions
Smith, Iain J
Fairweather, Malcolm M
Minimum detectable change
Muscle contractile properties
|Ditroilo M, Smith IJ, Fairweather MM & Hunter A (2013) Long-term stability of tensiomyography measured under different muscle conditions. Journal of Electromyography and Kinesiology, 23 (3), pp. 558-563. https://doi.org/10.1016/j.jelekin.2013.01.014
|Tensiomyography (TMG) is a technique utilised to measure mechanical and contractile properties of skeletal muscle. Aim of this study was to assess long-term stability of TMG across a variety of muscle conditions. Gastrocnemius Medialis of 21 healthy males was measured using TMG in rested conditions, after a warm-up, after a maximal voluntary contraction and after a fatigue protocol. Participants were re-tested on a second occasion 4 weeks apart. Among the parameters examined, Contraction Time, Sustain Time and Delay time exhibited a good level of absolute reliability (CV = 3.8-9.4%) and poor to excellent level of relative reliability (ICC = 0.56-0.92). On the other hand, relative reliability was good to excellent for muscle Displacement (ICC = 0.86-0.96), whereas its level of absolute reliability was questionable (CV = 8.0-14.8%). Minimum detectable change was less than 20% in most conditions for the aforementioned parameters. Half-relaxation Time yielded overall insufficient reliability. In general, the level of reliability tended to increase after the maximal voluntary contraction and the fatigue protocol were administered, probably because of more controlled conditions preceding the measurement. Information about the long-term stability of TMG across different muscle conditions is essential when intervention studies are undertaken with an exercising population, particularly athletes.
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