The influence on skill-related fitness that cannot be changed to improve fitness levels is A. heredity.
1. Heredity refers to the genetic factors that are inherited from one's parents. These factors can affect certain aspects of skill-related fitness such as speed, agility, and coordination. Unlike practice or specificity, which can be altered through training and targeted exercises, heredity is not something that can be changed or controlled to improve fitness levels.
2. Practice plays a significant role in enhancing skill-related fitness by refining techniques, improving muscle memory, and increasing performance levels over time. Specificity refers to the principle that training should be relevant and specific to the desired fitness goals to achieve optimal results.
3. While practice and specificity are factors that can be modified and adapted to enhance skill-related fitness, heredity is a fixed influence that individuals cannot alter to improve their fitness levels.
In conclusion, heredity is the influence on skill-related fitness that cannot be applied or changed to improve fitness levels, unlike practice and specificity which are modifiable factors through targeted training and exercises.
