Just like in modern times, all work and no play made Grok a dull boy. Hunter-gatherers have always generally worked fewer hours and have had more leisure time than the average 40-hour-plus American worker. Once the day’s catch was complete or the roots, shoots, nuts and berries had been gathered, our ancestors spent hours involved in various forms of social interaction that we might categorize today as “play.” Young males would chase each other around and wrestle, vying for a place higher up in the tribe social strata. Children might also practice spear- or rock-throwing for accuracy or chase small animals just for sport. Some might spend time creating or grooming. To the extent that play was considered enjoyable, the net effect was to solidify social bonds and to prompt the release of endorphins (feel-good brain chemicals) and to mitigate any lingering stress effects of life-threatening situations.
Spend some time each week involved in active play. In addition to allowing you to apply your fitness to a real-life situation, play helps dissipate some of the negative effects of the chronic stress hormones you’ve been accumulating through the week.