If You Failed At A Cardiovascular
Failure in this domain of fitness results in a lack of progress.
Cardiovascular training programs fail for one main reason - they are not TRAINING programs; they are EXERCISE programs.
The distinction is crucial.
Training is a very special form of exercise, but exercise is not a form of training.
This is similar to a square being a rectangle, but a rectangle is not a square.
To become fitter, you must train.
To train, you must stress your body "so that adaptation (to the stress) results." This adaptation is known as improvement or increased fitness.
"Physical training is beneficial only as long as it forces the body to adapt to the stress of physical effort. If the stress is not sufficient to overload the body, then no adaptation occurs...During physical training, for example, no training effect occurs if the stress is below a critical threshold."
(The quotes are from Brooks GA, Fahey TD, Baldwin KM. Exercise Physiology: Human Bioenergetics and Its Applications (4th ed). New York, NY: McGraw-Hill 2005:7.)
"Exercise" for weight loss is also very inefficient and easily undone. See here.
If you have failed at a cardiovascular training program, either from a lack of progress or you simply gave-up because you became frustrated from the lack of progress, you may be able to receive compensation for your lost time and money, since the program may have been negligently designed and/or you were negligently monitored.
Those possibly responsible to you include: