Which of the following best describes 'training load'?

Training load refers specifically to the volume and intensity of exercise performed in a training session or over a period of training. This includes not only the duration of the workout but also how hard the workout is, which together determines how much stress is placed on the body.

The intensity of an exercise session can involve various factors such as the weights lifted, speed, resistance levels, or heart rate zones reached, while duration simply refers to how long the session lasts. Training load is essential for designing effective training programs, as it helps to track and manage the stress placed on the body to prevent overtraining and injury while optimizing performance gains.

Other options, while they touch on aspects related to training, do not encapsulate the full definition and significance of training load. Rest periods are important but are just one component of overall training load. The overall fitness achieved is a result of consistent training load but does not define it. Similarly, setting a recommended daily exercise limit is more about guidelines for activity rather than a definition of training load itself.