抄録
An impotant consideration in cleaning tool design is the reduction of physical fatigue. A bathtub scrubbing hand tool (handle length=40cm, angle=20°, bestowed flexibility on cleaning part) was desinged to reduce physical fatigue. This scrubbing tool was then manufactured and evaluated by measuring electromyogaram and articular angle. This was compared with the one which is on the market, and another which doesn't have a handle. Under similar working conditions, results clearly showed that the designed hand tool reduced physical fatigue.
