Which technique is best to reduce strain during casualty lifting?

Using the stronger leg muscles is the best technique to reduce strain during casualty lifting because the legs are the body's largest muscles and are designed to handle heavy loads more efficiently than the upper body. Engaging the leg muscles allows for a more powerful lift while minimizing the risk of injury to the back and arms.

Using the legs helps maintain a proper body position, enabling the lifter to keep a stable base and leverage their weight effectively. This technique promotes proper biomechanics, ensuring that energy is transferred optimally during the lift. It is essential for preventing fatigue and injury, especially in high-stress situations like emergency medical response.

While pulling with the arms and leaning forward can contribute to lifting techniques, they do not leverage the body's strongest muscle groups and may lead to increased strain. A combination of upper and lower body could benefit lifting, but without emphasizing the strength of the legs specifically, there is a higher risk of overexertion. Therefore, utilizing the strong muscles of the legs is the optimal choice for lifting casualties safely and effectively.