About John Paul

John Paul Catanzaro, BSc Kin, CSEP-CEP, CSEP-HPS, is a CSEP Clinical Exercise Physiologist and a CSEP High Performance Specialist with a Specialized Honours Bachelor of Science degree in Kinesiology and Health Science. He owns and operates a private training facility in Richmond Hill, Ontario. In 1996, John Paul opened a personal training studio at his home in Toronto, Ontario. With vision and passion, the business quickly grew and the word got out: “If you want to get in shape, go see this guy!” Now located in Richmond Hill, Ontario, the business boasts a state-of-the-art training facility and a waiting list of clients. John Paul founded The Catanzaro Group in 2004 with divisions in fitness, nutrition, supplements, lifestyle, seminars, and publishing. In 2010, Catanzaro Supplements was introduced, a new line of nutritional supplements with the objective of providing high quality supplements in a convenient form at an affordable rate. Over the years, John Paul has appeared on television and has written articles for several publications, including American Academy of Health and Fitness (AAHF) Gamut eJournal, Bodybuilding.com, Bodybuilding Italia, canfitpro Magazine, Coaching One-On-One, Dolfzine, FitCommerce, Fitness Business Canada, Fitness Professional Online, Fitness Trainer, Flare, grrlAthlete.com, Intense Fitness, Men’s Health, Mercola.com, MuscleMag International, Olympian’s News, Personal Trainer Development Center, Personal Training on the Net, Planet Muscle, Quest For Advanced Condition, SelfGrowth.com, SpotMeBro.com, Testosterone (aka T-Mag.com and T-Nation.com), TheGymLifestyle.com and Wannabebig.com. His newsletters are informative and entertaining, and he has provided reviews for numerous publications, including the inaugural edition of Sport First Aid in Canada. John Paul has authored six books, The Elite Trainer (2011), Mass Explosion (2013), The Business of Personal Training (2014), The Warm-Up (2016), Lean and Mean (2017), and Invincible (2022), and has released two DVDs, Stretching for Strengthening (2003) and Warm-Up to Strength Training (2005), which have sold copies worldwide, featured in several magazines, and been endorsed by industry-leading experts. John Paul has also released four webinars, Strength Training Parameters and Program Design (2013), Body Composition Strategies (2013), The Business of Personal Training (2014), and Injury Prevention Strategies for Aging Athletes (2016), providing the latest cutting-edge information to fitness professionals. Throughout his career, John Paul has consulted for various corporations. He’s worked with law enforcement personnel and has contributed to the Toronto Police Service health and wellness program. John Paul has worked with bodybuilders, fitness models, athletes, and coaches ranging from amateur ranks to national-level caliber. John Paul is one of the premier trainers in Canada. Building a reputation for getting his clients in top shape quickly, his expertise has not gone unnoticed by other health practitioners who attend his private studio regularly for instruction. John Paul has attracted the attention of various fitness-related organizations seeking lectures and workshops. The list includes canfitpro, Certified Professional Trainers Network, Granite Club, Masters Swimming Canada, Ontario Kinesiology Association, Ontario Society for Health and Fitness, Toronto Cricket Skating and Curling Club, and more. Those who experience his presentations have dubbed him “the man with an encyclopedic mind.”

Supplement Periodization JP: Let’s discuss the concept of supplement periodization. What specific supplements would you recommend during a strength phase, power phase, hypertrophy phase, and endurance phase? And to take it one step further, what supplements should we use before, during, and after our workouts? Dr. Serrano: I’ll break this down into different phases: As…

I’ve posted two interviews with Dr. Eric Serrano in the past, and not too long ago, I found a third one on my hard drive that had gone missing. It’s time to open the vault! Increasing Growth Hormone (GH) Naturally JP: Many people are looking for ways to naturally increase growth hormone (GH) levels. Any…

Liver tablets were once a staple among old-school bodybuilders, but their popularity faded toward the end of the 20th century. That’s unfortunate because this forgotten supplement offers powerful benefits for muscle growth and overall health. Liver is a true superfood, packed with nutrients that support performance and recovery. While most people shy away from eating…

I have hundreds of old muscle magazines tucked away in storage, but the one that started it all for me was the December 1985 issue of MuscleMag International, featuring Scott Wilson on the cover. I must have read that magazine every day for weeks. One of the standout pieces in that issue was an excerpt…

Most people “wear their shoulders too low,” according to Dr. Shirley Sahrmann, author of Diagnosis and Treatment of Movement Impairment Syndromes. At an Ontario Kinesiology Society seminar in 2004, Sahrmann pointed out that shoulder depression causes more problems than elevation—one of the most common being neck pain. Simply raising the shoulder girdle can improve cervical…

If your goal is to lose weight fast and look like an actress, I have news for you—dramatic results don’t happen overnight! A serious transformation takes serious time and effort. You can’t undo 30 years of poor habits in 30 days—it just won’t happen. One of the biggest obstacles in weight loss is the inability…

When people ask me what supplements to take for a joint-related injury, I have several recommendations—proteolytic enzymes, hyaluronic acid, and bamboo silica, to name a few. But one secret weapon I often suggest is gelatin. If you’re injured, take gelatin twice a day: once in the morning and again before bed. If you want to…

Many strength athletes are creatures of habit. They do the same thing day in and day out. They get big, they get strong, and sometimes they get bored! A great way to cure boredom is to set a challenge. Forget about adding more weight to the bar. Do something different. In fact, forget the bar…

Your worth as a personal trainer is directly proportional to your knowledge. If you want to succeed in this industry, you need to allocate time every year for continuing education. The more you learn, the more you earn! Now is a great time to plan your education for the year. Here are some resources to…

Every day, we make thousands of choices—some big, some small—and every one of them can influence our lives. Even the most minor decision can have a major impact. Before an early morning workout, for instance, you can choose to go out partying all night, or you can choose to go to bed early. You can…