According to fitness principles, what does the law of disuse explain?

The law of disuse refers to the concept that skills and knowledge that are not regularly practiced or applied tend to diminish over time. This principle emphasizes the importance of consistent practice and engagement in order to maintain and improve one's abilities. When a person does not actively use a skill, it can fade, leading to a decline in proficiency or understanding.

In the context of fitness, this principle suggests that if an individual does not regularly participate in physical activities or continue their fitness training, they may lose the benefits gained from that training. This means that consistent engagement is crucial for retaining fitness levels, as well as for maintaining learned skills.

The other options discuss different fitness concepts but do not align with the principle outlined by the law of disuse. For instance, the notion that a skill will improve over time without practice contradicts the essence of this law, which states that lack of use leads to forgetting rather than improvement. Similarly, while early training can enhance skill acquisition, it does not negate the fact that without ongoing practice, those skills may be lost. The claim that knowledge gained is always retained also does not hold true without active reinforcement and practice.