Erikson theory of psychosocial development proposed 8 stages of development over the course of human lives. The sixth stage is known as Intimacy vs Isolation. This stage occurs between the ages of approximately 19 and 40 and the major conflict during this stage is on the formation of intimacy and relationship with others.
Goals are steps towards managing tasks, goals motivate you to accomplish them, and having a goal gives you a clear sense of just how much exercise you need this balancing life and exercise.