The modern sports is an activity with fierce competition and rivals. During routine training, the athletes usually are trained and strengthened by using kinds of fitness equipments to achieve match requires and get high scores. In the process of designing sports fitness, high safety factor is highly demanded. Starting from the design idea of fitness’s safety, this paper will study on body dimensions data, psychological suggestions of color, shape morphologic semantics and safety protection equipments in the hope of improving the safety of fitness and providing fine reserve protection and professional support for the professional training of athletes.