Nick Tumminello is the owner of Performance University International, which provides strength training and conditioning for athletes and educational programs for trainers and coaches all over the world.

As an educator, Tumminello has become known as the trainer of trainers. He has presented at international fitness conferences in Norway, Iceland, China, and Canada. He has been a featured presenter at conferences held by such organizations as the IDEA Health & Fitness Association, the National Strength and Conditioning Association, and DCAC Fitness Conventions, along with conducting staff trainings at fitness clubs throughout the United States. Tumminello does workshops and mentorship programs in his hometown of Fort Lauderdale, Florida. He is the author of Building Muscle and Performance (Human Kinetics, 2016) and Strength Training for Fat Loss (Human Kinetics, 2014). He has produced more than 20 instructional DVDs and is the coauthor of the National Strength and Conditioning Association's Program Design Essentials and Foundations of Fitness Programming. Tumminello is also the editor in chief of the National Strength and Conditioning Association's Personal Training Quarterly (PTQ) journal.

Tumminello has been a fitness professional since 1998 and co-owned a private training center in Baltimore, Maryland, from 2001 to 2011. He has worked with a variety of exercise enthusiasts of all ages and fitness levels, including physique and performance athletes from the amateur level to the professional ranks. From 2002 to 2011, Tumminello was the strength and conditioning coach for the Ground Control MMA fight team. He has been a consultant and expert for clothing and equipment companies such as Sorinex, Dynamax, Hylete, Reebok, and Power Systems.

Tumminello's articles have appeared in more than 50 major health and fitness magazines, including Men's Health, Men's Fitness, Muscle and Performance, Women's Health, Oxygen, Fitness Rx, and TRAIN. He is also a featured contributor to several popular fitness training websites. He has been on the advisory board for Yahoo! Health and has been featured in two exercise books on the New York Times-best seller list, on the home page of Yahoo! and YouTube, and in the ACE Personal Trainer Manual. In 2015 Tumminello was inducted into the Personal Trainer Hall of Fame.

Tumminello writes a popular fitness training blog at [...].