Abstract: A punching bag specifically designed and constructed for use with a reaction time and applied force measuring device. An elongated bag is suspended between an overhead support and the floor. The punching bag is supported from the overhead support by a plurality of rope-like members which extend outwardly and acutely from the punching bag. The punching bag is secured to the floor by a rope-like member attached to the bag's bottom. The bottom rope-like member has slack such that the bag may swing within a confined radius. Additionally, springs may be included with the rope-like members and the support structures such that the reactionary force is enhanced.