What is meant by 'adaptation' in the context of physical training?

Adaptation in the context of physical training refers to the body's physiological adjustments in response to exercise stress, specifically to the intensity and demands placed upon it. When an individual engages in regular physical activity, their body undergoes various changes to better cope with these challenges. This includes improvements in cardiovascular function, muscle conditioning, and metabolic efficiency.

As the body adjusts to higher levels of exercise intensity, performance improves, allowing for greater endurance, strength, and overall fitness. The concept of adaptation emphasizes that regular training leads to both physical and psychological changes, enabling the individual to handle increased workloads over time. The focus on the body's adjustments highlights the importance of progressive overload in training programs, as this principle is key to further adaptations and improvements.

The other options do not capture the full scope of adaptation in physical training. While improvement in endurance and body resistance to injury are important outcomes of regular exercise, they are more specific effects of adaptation rather than defining what adaptation itself means. Limitation of strength gains, while a consideration in training, does not accurately represent the concept of adaptation, which generally implies an increase in physical capabilities rather than a limitation.