Our bodies are pulleys and levers, biologic chemical processes and many sensors of multiple types. A Brain as a central processor.
Sports involve thought, repetitive training for muscle memory, psychology, nutrition support, and exercise. As we age we lose muscle and protein.
Look for the separate tabs under BODY for specific information.
Pulleys and Levers – Muscle tendons facia this 2 part written guide is perfect for a summary: BIOMECHANICS FOR SKI INSTRUCTORS – Peter Issacs PART 1 and PART 2 page 16 starts the Children