Progression is gradually increasing the amount and type of stimulus applied to the muscle during each exercise. Overload is increasing the amount of activity such as the weight, duration, speed, and distance.
*Responses will vary. A sample response follows:* Both progression and overload are concerned with slowly increasing the intensity and challenge of the exercises of a workout. Overload arises from the need to increase exercise intensity to maintain a challenging workout: as a body adapts to a given exercise level, the difficulty must be increased to keep challenging the body and making progress. Progression is closely related to overload and also requires that an exercise program gradually become more difficult. Progression, however, is focused on the increased goals of an exercise program rather than the adaptation of the human body.