ABSTRACT
To make a shot, a modern sport bow is situated vertically with its main plane. Despite a simple construction at first sight, bow moves surprisingly complicated. Its motion is in 3D space before, during, and after shot. Bow riser movement is significantly smaller than arrow movement, string movement, and two limbs movement in the vertical plane. All the system moves laterally too, but this movement is smaller in comparison to the movement in the main plane. Bow riser movement before the shot, i.e. before string release, is under the archer control and directly affects aiming. Movement during the shot, i.e. during string and arrow common motion is partly controlled by the archer hand holding a bow riser and partly is free. This movement affects aiming to some extent.
