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Anonymous
>>281179 lats, serratus (in some variations), bis, delts, tris (if it's a muscleup), forearms (gripping the bar... thumb on same side as fingers for even better gains), pecs (in supine), abs (actively in prone, supine, and muscleup... a stabilizer in the rest), longissimus (actively in commando, and as a stabilizer in all the rest), erector spinae (active in prone, stability in the rest)
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