Key result
The relationship between muscle activity and joint moments may differ between natural motor tasks and controlled experimental situations, emphasizing the importance of correct electromechanical delay.
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Highlights the importance of correct electromechanical delay identification when comparing EMG and joint moment data in natural motor tasks.
In this commentary we question whether the relationship between muscle activity and joint moments is the same for natural motor tasks as for controlled experimental situations. An important consideration in this regard is the identification of the correct electromechanical delay (EMD) for comparing EMG and joint moment data. Data from recent cycling studies are used to illustrate the importance of EMD, and how changing task constraints can alter the relation between muscle activity and joint moment balance for bi-articular antagonist pairs.
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Caldwell et al. (2000) reported an editorial. Muscle activity was evaluated. The relationship between muscle activity and joint moments may differ between natural motor tasks and controlled experimental situations, emphasizing the importance of correct electromechanical delay.
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