The definition of training is to do physical activity in preparation to compete or to work out in which keeping fit is the objective.
All of the games we play teach us to have great work ethics, become better leaders, team mates, goal setters, problem solvers, stress managers, and quick thinking high performers.
All of which give you an advantage at life. Training is done everyday for many different reasons. Whether it is to become a better athlete, employee, or civil servant. People train, they train for their personal goals, team objectives, job development and productivity, or most importantly life. In many cases the ability and intensity at which a person or group will train gives them an advantage whether in the competitive workplace, or partaking in an athletic endeavor. Your fitness level in many cases dictates your success on the field, in the classroom, or at work. It allows you to stay focused, composed, and task oriented.
Get yourself a trainer. A well-rounded, educated trainer can help. They provide guidance, support, knowledge, and philosophy. Not all trainers are certified but the majority of them are. In my opinion this is more of a union card than anything else. There are many certifications on the market and a few are the industries gold standard. This is not the end of the story though, just the beginning. You can read a ton of books but without practical knowledge but that will only take you so far.