Only if your watch's power reserve is depleted. When you set the watch you will need to wind the watch with the crown approximately 30-50 turns, then hack, set and wear. As long as you are wearing the watch and are reasonably active the automatic winding mechanism will maintain the power reserve at the optimal level. When worn daily it is not necessary nor advisable to wind the watch manually in order to "top off" the power reserve. Doing so can unnecessarily decrease the time between service intervals.