[3][4] Things improved after he encountered a quote by Joan Baez, "Action is the antidote to despair,"[3] and after he met his future wife, Heidi, a medical school student.

[4] Fell became a certified strength and conditioning specialist[5] and wrote a column called "In-Your-Face Fitness" for the Chicago Tribune; he also wrote about fitness for the Los Angeles Times, AskMen, Men's Health, Time, The Guardian, NPR, and Chatelaine magazine.

[3] In his writing, Fell sought to debunk fitness myths, warned against fad diets, advised not comparing your body to others, recommended participating in both aerobic and weightlifting activities, and suggested finding a physical activity that a person will not hate, eventually becoming proficient at it.

[7] In 2019, Fell's book The Holy Sh!t Moment was published by St. Martin's Press, which discussed the psychology and steps needed for long term transformations.

[8] In one of Fell's first articles for the Los Angeles Times, he wrote about Jillian Michaels, the fitness trainer from the television series The Biggest Loser.

[12][13][4] Fell added to his web page a "Historyscope", inspired by daily horoscopes, so readers could find out what happened in history on their birthday.

[14] In 2023, Bantam Books released On This Day in History Sh!t Went Down,[15] and it was ranked fourth on the Canadian non-Fiction Best sellers list for the week of October 9 to 15, 2023.

[17] Fell, talking about a range of topics including fitness, motivation, and history, has appeared on podcasts, Canadian television, and radio shows.

[32] He and actor Chris Evans shared a post written by Fell, seeking to explain why a "straight pride" parade made no sense.

[38] He writes in the morning, taking Ritalin in the afternoon when he needs to complete household chores, marketing and administrative work.