During the pandemic 40% of Americans exercised at home for the first time. 54% of Americans who regularly work out at their homes have purchased fitness equipment, and 59% of Americans said they will not renew their gym subscriptions post-pandemic, leaving individuals in charge of designing their own exercise plans. People over 45 make up over 60% of group fitness consumers. The average age of the American marathon runner is 40. These consumers are aging out of "what used to work" and they are searching for more impact and more meaning in their fitness experience. While other books may focus on a particular type of exercise or a specific audience, The New Fit empowers readers with the knowledge to curate their own results-driven wellness plans based on data and individual factors. Author Aaron Leventhal is a NSCA CPT®, CSCS®, and Precision Nutrition-certified fitness expert as well as a former professional soccer player for the Minnesota Thunder. He served as a conditioning coach for the Thunder and then for the Major League Soccer team Minnesota United for 15 years.

He has worked with athletes on the U.S. Olympic Ski team, as well as individual NHL, NFL, and NCAA athletes. In 2002, he founded Fit Studios and has served more than 20,000 clients over two decades. Leventhal also spent time as the senior director of the largest fitness chain in the world at Self Esteem Brands, where he worked to integrate personal training and group fitness operations to all domestic AnyTime Fitness gyms. Leventhal has published or been featured in numerous articles on health and fitness in outlets such as Runners World , Men's Health and GQ , in addition to journals of sports medicine.