Introduction to Digital Human Modeling bridges the gap in current literature by providing a comprehensive book on digital human modeling for beginners and researchers. The contents include step-by-step procedures to build a digital human model, fundamental human kinematics and dynamics, advanced topics like motion prediction and injury prevention, and industrial applications. The target audience is undergraduate and graduate students in biomedical engineering, mechanical engineering, industrial engineering, and kinesiology. The book covers theories and experiment-based validation, including human anatomy, degrees of freedom, skeletal and musculoskeletal modeling, equations of motion, reach envelopes, lifting prediction, and injury analysis. The book teaches readers how to build simulation-based human models, set up equations of motion, analyze human biomechanics, and use simulations and experiments to study worker injuries. The book provides an introduction to fundamentals and advanced digital human modeling methods and optimization techniques to improve performance and prevent injuries in manual material handling and address lifting and gait biomechanics and ergonomics.