I read a Frederic Delavier’s book « Strength Training Anatomy » and there is good stuff.
Standing or sitting with a dumbbell in a hand and your arm in a vertical position :
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Inhale and flex your arm to bring the dumbbell behind your neck.
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Back to the start position and 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 : It’s important to squeeze your abs to avoid over-arching your back.
-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.