ABSTRACT
In this chapter, we look at the conceptualization of ‘dysfunctional exercise.’ We propose that dysfunctional exercise has a non-exercise-related incentive behind it most of the time, except when the individual is unable or is unwilling to realize the personal physical limits related to performance/achievement goals. Next, we examine the popular runner’s high phenomenon, a euphoric feeling state, reported after an exhaustive workout. We also review the relationship between the runners’ high phenomenon and the brain’s opioid system in this context. Based on the extant evidence from the scholastic literature, it is unlikely that endogenous opioids and endocannaboids associated with exercise may cause dependence and addiction, so it is unlikely that they lead to dysfunctional exercise.
