Different uses: Stretchers are generally used to exercise muscle strength and physical fitness, and are a kind of fitness equipment. Bow and arrow drawing is mainly used for shooting and hunting, and it is an archery tool. Different structures: the tensioner is generally made of materials such as spring or rubber belt, which generates resistance through stretching and contraction and is operated by handle or handle. Bow and arrow are composed of bow and arrow chords. Pull the string by hand, the bow will be elastic and shoot the arrow. Different operation modes: the operation mode of the stretcher is mainly to repeatedly perform certain actions by stretching and relaxing, which can be adjusted according to needs. The operation mode of drawing bow and arrow involves the correct posture, the strength of drawing string and the aim of the target, which requires certain skills and training.