Humans walk and run at various speeds by coordinating their whole-body movements skillfully, where they regulate the movements in accordance with the speed. However, it remains unclear what kinds of locomotion parameters they regulate and how to regulate the parameters. In the present study, to clarify the human strategy for regulating the whole-body movements in accordance with the speed, we measured human joint angles on sagittal plane during walking and running and analyzed the measured data by extracting low dimensional structure of the joint movements using singular value decomposition. Our results suggest a formation mechanism of human gaits, which contributes to elucidating the adaptation mechanism of human locomotion.