ABSTRACT
Objective To study the effect of reasonable jogging speed on body shape and walking gait to make people acquire graceful posture through jogging. Method Five jogging speeds were selected according to related measurements. Kinematical data of subjects (15 young women volunteers) in jogging were measured by the motion capture system, while the EMG signals of 8 major muscles in lower limb were collected simultaneously. The mean angles of hip, knee and ankle joints in sagittal plane at different speeds were calculated. The subject whose data was closest to the mean value was chosen as the research subject and analyze the kinematical data. Results The angles of the subject's hip, knee and ankle joints in sagittal plane at different speeds in a gait cycle were presented, and activation curves of her 8 major muscles were obtained during lower limb movements. Relationships between the jogging speed, jogging stage, muscle activation and joint angle were described by the scoring method. Conclusions The range of joint angle and maximum of muscle activation don't change with jogging speed monotonously. The study provides a reference for young women to choose their own jogging speed.
ABSTRACT
Digital medicine is an important development of the modern medicine and the computer-aided surgery is an important part of the digital medicine. Applications of digital techniques in the computer aided preoperative planning are elucidated in the paper. Techniques of computer-aided design and computer aided manufacture have been widely used in the fields of customized prosthesis replacement, design and manufacture of customized surgical tools and medical auxiliary instruments and here some clinical cases are introduced. The fundamental technologies used in the surgical navigation and related clinical applications are also explained. The development trend of the computer aided surgery is described and it is concluded that the computer-aided surgery has a bright future.