This study is based on Kinect somatosensory equipment, according to the specifications of the Sports Administration of the Ministry of Education, to design two seniors physical fitness testing systems: chair sit-and-reach test distance measurement and back scratch test distance measurement. The chair sit-and-reach test distance measurement is mainly based on the user's data. According to the testing process and precautions of the National Fitness Test, the design is in five stages: preparation, hook tip, hand extension, detection and evaluation. The back scratch test distance measurement is designed in four stages: preparation, habitual hand backwards, another hand backwards, detection and evaluation. After the real test, the average error of the chair sit-and-reach test distance measurement is about 0.55 cm; and the average error of the back scratch test distance measurement is about -1.03 cm.