Isometric muscle contractions represent an important component in the development of muscle strength and power and an effective strategy for injury prevention. This thesis is based on a detailed analysis of the anatomy of the lower leg, including an overview of the bones, muscles, and their functions, and explores the role of isometric exercises in conditioning. The paper examines approaches to isometric training, its applicability in sports practice, and its importance for injury prevention. Special emphasis is placed on the review of existing research that confirms the positive effects of isometric training on increasing the strength, power and elasticity of tendons and the resistance of the muscle-tendon system to injuries. In addition, the work includes practical guidelines for the implementation of isometric exercises in training processes with the aim of maximizing their effectiveness and safety for athletes and people involved in regular fitness programs. Through a multidisciplinary approach, the thesis highlights the importance of isometric contractions in modern strength and power training, emphasizing the need for further research and development of specialized training programs that would use this method to improve physical performance and prevent injuries. Furthermore, this work investigated the complex biomechanical processes involved in isometric contractions and how they contribute to the structural and functional integrity of the musculoskeletal system. Finally, this paper tried to answer the question of how the correct application of isometric exercises can help in the prevention of lower leg injuries, emphasizing the importance of an individualized approach and adaptation of training to the specific needs and limitations of athletes. Through a combination of theoretical insight and practical examples, this research provides insight into understanding the benefits of isometric training, providing a foundation for developing more effective and safer training programs.