In practical terms, both upper and
middle trapezius display high muscle activity at knee flexion angles of 31 — 60 degrees.
Upper trapezius muscle activity displays superior muscle activity during the top half of the deadlift, while
the middle trapezius displays superior muscle activity during the bottom half.
Not exact matches
However, Ackland et al. (2011) explored the moment arm lengths of the neck muscles and found that the upper and
middle fibers of the
trapezius displayed its greatest force producing capacity during neck extension.
When comparing the bent - over row to the upright row, superior
middle trapezius muscle activity was
displayed during the bent - over row.
Therefore, the
middle trapezius appears to
display its greatest muscle activity during horizontal rowing exercises.