Pronation Action with Pencil Violin Bow Technique Martelé, Collé, Hookstroke & Upbow staccato Bow-Hand Pronation Pronation is a way to apply pressure to the bow so that the bowhair grips the string. Rotate the forearm in an anti-clockwise direction from the elbo... New members register here for VBT+ Current members please Login Username Password Remember Me Forgot Password