What does "overload" refer to in training?

Overload in training fundamentally refers to the principle of systematically increasing the intensity, duration, or frequency of physical activity to enhance fitness levels and performance. By pushing the body beyond its current capabilities, it stimulates physiological adaptations such as improved strength, endurance, and overall athletic performance. For instance, increasing the weight lifted in strength training or adding additional distance in endurance running are practical applications of this principle.

In contrast, simply increasing protein intake, simplifying workout routines, or focusing on form and technique does not represent the concept of overload. While those aspects can certainly contribute to overall fitness and performance, they do not involve the essential component of progressively challenging the body through enhanced effort or workload. Overload is what drives progress and improvements, making it a key concept in any effective training program.