Introduction:
Biomechanics is the study of the mechanical principles of living organisms, especially their movement and structure. It has various applications in sports, healthcare, and rehabilitation. While biomechanics has several important contributions, one of them does not directly relate to the physiology of the human body.

Importance of biomechanics:

a) Improvement of sports technique:
Biomechanics plays a crucial role in improving sports technique by analyzing and optimizing an athlete's movements. It helps identify inefficient or incorrect movements and suggests modifications to enhance performance. By understanding the mechanics of movements, athletes can improve their techniques and enhance their overall performance.

b) Provides information about the structure of movement and the nature of forces acting on the movement:
Biomechanics provides valuable insights into the structure of movement and the forces acting on the body during various activities. It helps determine the forces exerted on joints, muscles, and bones, allowing for a better understanding of the mechanics behind movement. This knowledge can be used to prevent injuries, design rehabilitation programs, and optimize sports performance.

c) Understanding about the physiology of the human body:
Although this option is listed as the incorrect answer, understanding the physiology of the human body is a significant aspect of biomechanics. Biomechanics involves studying how the body moves, the forces applied, and the physiological responses that occur during movement. It helps researchers and practitioners gain a deeper understanding of the human body's capabilities, limitations, and adaptations.

d) Improvement of sports equipment:
Biomechanics plays a crucial role in the design and improvement of sports equipment. By analyzing the movement patterns and forces exerted by athletes, biomechanists can provide valuable insights to manufacturers. This information helps in the development of equipment that enhances performance, reduces injuries, and improves overall safety.

Conclusion:
Biomechanics is a multidisciplinary field that encompasses various aspects related to human movement. While all the options mentioned have their importance, understanding the physiology of the human body is not the primary focus of biomechanics. Instead, biomechanics primarily focuses on analyzing movement patterns, optimizing sports techniques, providing information about forces acting on the body, and improving sports equipment.