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Sprinting ability is signifi cant for the optimal performance of various sports such as football, basketball and handball. Researchers have attempted to measure running velocity and power in various ways: by using a self-driven treadmill, in which the treadmill belt is moved by a subject’s kick action without any motor assistance (Lakomy 1986, Jaskolska, et al., 1999, Funato, et al., 2001); by using a treadmill with motor assistance (Fork, et al., 1996, Chelly & Denis 2001); and, by simply assessing running ability. Among the previous studies, Funato, et al., (2001) indicated that mechanical power measured on a treadmill was signifi cantly correlated to the time taken to run 50m on the ground. In their study, however, the subjects had to run in an abnormal way because their hands were kept forward to grasp the treadmill handles during running. In addition, it was impossible to clarify the relationship between propelling force and running speed because the running speed could not be controlled. The force obtained by the force transducer set at the handles depends on the belt load. So, in turn, the calculated mechanical power depends on the belt load. Jaskolska, et al., (1999) developed a treadmill in which the belt was loaded by an electrical brake, and found a linear relationship between belt velocity Assessment of Sprinting Abilities Using a Resistant Self-driven Treadmill