Work capacity is the ability to perform work, which determines your level of fitness that will, and in turn, will determine your level of preparedness. It’s an issue for people in contact sports and in the military. In fact, off-season weightlifters, off-season athletes, and pretty much everybody and anybody could and would benefit from improving their work capacity.
Mel Siff defined work capacity in his book Supertraining as “the general ability of the body as a machine to produce work of different intensity and duration using the appropriate energy systems of the body.” So then by raising our overall ability to do work, all of our other attributes and characteristics will be more attainable, regardless of specificity. This is why a general preparedness program serves as the foundation to build off of and the better the foundation and the better the structure will be.