The duration of exercise is the volume or number of sets performed. Intensity and duration have an inverse relationship. Meaning, the harder you train, the less time can be spent training. This is because we have a finite amount of fuel available to carry that level of stress. This is not a choice or an opinion; it?s fact.
Let?s take another look at a sprinter versus a marathoner. By definition a sprint is: To move rapidly or at top speed for a brief period, as in running. The key words here are ?top speed? and ?brief?. A sprinter runs with all out effort or 100% intensity. Because of this all out effort, which is a tremendous amount of stress on the body, the duration of the movement is brief. Now it becomes clear why a 400 meter run and longer are not considered sprints. Although some do consider the 400m a sprint, runners are not running with all out 100% effort as in the 100m or 200m sprints. Point being, one can only exert themselves with 100% effort for so long.
In the case of marathon runners, they train at a very low intensity. Because of the inverse relationship between intensity and duration, unlike sprinters, endurance athletes can train for extended periods of time. This is not to say endurance training is not difficult, I am merely pointing out the physiological fact the body can only train so hard for so long.
This brings us to the second way most people train too much, but the most common; too many sets. Although training hard is the best way to move forward, some people are under the impression that doing more is training harder. This couldn?t be farther from the truth.
Training all out, poses extreme demands on the body’s resources, which are governed by genetics and in limited supply. Because of this finite supply, the body will not allow you to train ?too hard? for too long, and gives clues you are reaching your limits. Once you reach failure performing a set, or run out of gas during a workout, you?re simply not able to train any harder. It doesn?t matter what you do at this point, the body is done. Performing anything more than what is optimum, will hinder your progress. Yet, at this point, most perform more sets with reduced weight or reduced intensity because of the more is better mentality. Do not get caught in this no win cycle.
