What does the term "overload" imply in a physical training context?

In a physical training context, "overload" refers to the principle that in order to improve strength, endurance, or fitness, one must progressively increase the amount of stress placed on the body during exercise. This means using weights or resistance that are greater than what the body is accustomed to, which prompts physiological adaptations.

When the body is exposed to overload, it responds by strengthening itself, increasing muscle size, improving cardiovascular efficiency, or enhancing flexibility, depending on the type of training involved. This principle is essential for progression in physical fitness and is based on the understanding that the body will adapt to the demands placed on it.

Options that imply using normal weights or weights lower than what the body is accustomed to do not align with the overload principle, as they do not provide the necessary stimulus for improvement. Additionally, resting the body completely runs counter to the concept of applying overload, as rest does not facilitate physical adaptations but rather allows for recovery. Thus, utilizing weights greater than what the body is used to effectively applies the overload principle and is critical for progression in training.