In strength training, what does the concept of overload refer to?

The concept of overload in strength training refers to the principle of gradually increasing resistance to enhance muscle strength and endurance. Overload means that to stimulate muscle growth and strength adaptation, the muscles must be subjected to a level of stress that is greater than what they are accustomed to. This can involve increasing the weight lifted, adding more repetitions or sets, or modifying the tempo of the exercises. By continually challenging the muscles, they respond by becoming stronger and more capable, ultimately leading to improved performance.

This progressive approach is essential for continual improvement in strength training. If the same weights are used or repetitions performed consistently without any variation, the muscles will adapt and progress will stall. Increasing the challenge over time is vital for ongoing enhancement of muscular strength and endurance.