I read a Frederic Delavier’s book « Strength Training Anatomy » and there is good stuff.
Sitting and you take the dumbbell with your two hands behind your neck :
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Inhale and make an extension with your arms
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Exhale at the end of the movement
The vertical position of the arm stretches the long head of the triceps to have a good contraction during work.
Note : The three head’s fiber of triceps muscles fit into a tendinous plate which is attached by a tendon to the olecranon. When triceps squeeze, the tendinous plate into the head’s fibers like a wooden plate sinking into butter. Squeezed muscle protrudes from the tendon plate creating this « horseshoe » form.
-Steph
P.S. If you’re in Miami and you like Caribbean food, go to my cousin’s bistro to eat Haitian food. Click here.