The activity and technique principle of football shooting are investigated from the viewpoint of nano-bio-mechanics

This research aims to investigate the effect of strength training on soccer ball shooting speed, comparing biomechanical characteristics. Some important biomechanical parameters, including the maximum angular velocity of the hip and knee joints, the maximum torque of the hip and knee joints in the forward movement and impact phases, and finally, the maximum ball speed, were selected for analysis. One-way analysis of variance with repeated measures and Tukey's test showed a significant decrease in the maximum ball speed and the maximum angular speed of the knee joint between the first and fifth shots and subsequent shots. Compared to the first shoot, the hip joint's maximum angular velocity, and torque significantly decreased from the sixth shot onwards. After five weeks of performing strength and flexibility exercises, a test was taken comparing two methods of strength and flexibility. Ultimately, the data were analyzed with correlated and uncorrelated t-student statistical methods. The results showed that the selected strength training program significantly affects shot range and dribble speed. Also, to increase the physical and mechanical resistance of soccer balls, nanotechnology has been used by the production of plastics with nanomaterials.