main agonists

M. latissimus dorsi
M. teres major
M. trapezius, Pars transversa
Mm. rhomboidei
M. deltoideus, Pars spinata

synergists

M. trapezius Pars ascendens
M. erector spinae
M. biceps brachii
M. biceps brachialis
M. biceps brachioradialis

Description:

For this test you need the straps. In your starting position you are sitting down with a straight back. Your head is in line with your spine. Your elbows are moved backwards close to your ribs. You pull with maximal force for about 5 seconds.