9

in her 2019 book, the joy of movement, psychologist kelly mcgonigal writes about studies of endocannabinoids, the brain chemicals that are mimicked by marijuana, and that happen to be released by certain types of exercise: “Many of the effects of cannabis are consistent with descriptions of exercise-induced highs, including the sudden disappearance of worries or stress, a reduction in pain, the slowing of time, and a heightening of the senses.”