To my family, for their infinite support and unending patience. To my friends, for their inspiration. And to my readers, whoever you may be, for your interest.

COLLIN CARROLL is a writer, personal trainer, firefighter, EMT, tabletop game designer, three-time Ironman triathlete, SAT/ACT tutor, and amateur evolutionary biologist. These bona fides double as evidence of his ADHD.

Collin realized the importance of fitness during his sophomore of high school when, although small and not particularly skilled, he out-worked-out his rugby teammates to earn a spot on the Varsity A-Side squad. Later, as a student at UNC-Chapel Hill, Collin battled a nasty flare-up of his ulcerative colitis in part by staying active…ten months after being discharged from UNC’s hospital, he completed his first Ironman triathlon in thirteen hours, fifteen minutes. After graduating a year early from UNC, Collin became a personal trainer, furthered his education at Columbia University, wrote multiple academic papers, and now, released Fitness by Darwin!

Collin was born in Connecticut to Kevin and Mary Carroll. He currently lives in Connecticut with his roommates, Kevin and Mary Carroll. You can read more about his other work here.