STRENGTH | MUSCLE – UB – SHOULDERS – RESEARCH


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Muscle activity of the core during bilateral unilateral seated and standing resistance exercise


Saeterbakken AH1, Fimland MS.
Eur J Appl Physiol. 2012 May;112(5):1671-8. doi: 10.1007/s00421-011-2141-7. Epub 2011 Aug 30.
PURPOSE/METHOD
– Compare the electromyographic activity (EMG) of the superficial core muscles (i.e. rectus abdominis, external oblique and erector spinae) between seated, standing, bilateral and unilateral dumbbell shoulder presses
– 15 healthy males performed five repetitions at 80% of one-repetition maximum of the exercises in randomized order
RESULTS
– Rectus abdominis: ~49% lower in seated bilateral versus unilateral, similar in standing bilateral versus unilateral, ~81% lower in bilateral seated versus standing, ~59% lower in unilateral seated versus standing
– External oblique: ~81% lower in seated bilateral versus unilateral, ~68% lower in standing bilateral than unilateral, ~58% lower in bilateral seated versus standing, ~28% lower in unilateral seated versus standing
– Erector spinae: similar in seated bilateral versus unilateral, ~18% lower in standing bilateral versus unilateral, similar in seated versus standing bilateral and unilateral
CONCLUSION
– To enhance neuromuscular activation of the superficial core muscles, standing exercises should be used instead of seated exercises, and unilateral exercises should be used instead of bilateral exercises


 

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