Dynamic characteristics of human upper extremities are usually modeled with mechanical impedance. Although many studies have been reported on the human impedance characteristics, there is no such a report in which the human impedance is utilized for skill training and rehabilitation. As the first step to develop a training method based on human impedance characteristics, this paper proposes a virtual sports training system using a virtual reality technique in order to measure human movements during sports. From experiments, differences of movements between skilled and unskilled subjects are analyzed.