Final answer:
The overload principle in exercise involves placing extra physical demands on the body to improve fitness. By gradually increasing the intensity, duration, or frequency of exercise, the body adapts and becomes stronger. It is important to avoid overtraining and excessive stress on the body.
Step-by-step explanation:
The overload principle in exercise refers to improving fitness by placing extra physical demands on the body. It involves increasing the intensity, duration, or frequency of exercise to challenge the body beyond its current capabilities. By doing so, the body adapts to the increased demands and becomes stronger and more efficient.
For example, if someone wants to improve their muscle strength, they can progressively increase the weight they lift during resistance training. Over time, this will lead to increased muscle mass and strength.
It is important to note that while the overload principle is beneficial for improving fitness, it is essential to avoid subjecting the body to inappropriately high stress or overtraining, as this can lead to injuries and other negative effects.