Meet the Trainers

Marc Rosamilia


Marc is a former competitive body builder and stand out high school wrestler who holds a Bachelor of Science degree in Health and Nutrition Counseling. He is a Certified Physical Education Teacher for grades K-12 in New Jersey and Certified High School Strength and Conditioning Specialist with the International Youth Conditioning Association. Marc is also a Certified Personal Trainer and Performance Enhancement Specialist with The National Academy of Sports Medicine.

Marc was a three-time all conference first team wrestler, placing in the county tournament three consecutive years. He became team captain his sophomore year of high school as well as the school’s first District Champion his junior year. During his senior year, Marc was chosen for The Catholic Advocate all-state first team by high school and college coaches statewide.

Adam Eckart


When he’s not working with clients to achieve their health and wellness goals, Adam can be found teaching at Kean University, where he is a professor in their Global Fitness and Wellness Program. He co-designed the concept and practice of Critical Mass Training Systems, employing innovative coaching and training strategies. His expertise in Motor Learning and Control form the basis for his cutting-edge preventive and corrective exercise program.

Adam also attended Kean University, where he earned a Bachelors Degree in Adult Fitness and a Masters Degree in Exercise Science. He is a Certified USA Weightlifting (USAW) instructor, Certified Strength and Conditioning Specialist (CSCS) and a highly sought after Russian Kettlebell expert.

With over 10 years of experience in the industry – combined with his wide-ranging expertise – Adam is an asset for clients from all walks of life.

Jon Kalnas


Jon Kalnas graduated from Monmouth University with a Bachelors of Science in Psychology with a focus on child development. While in school, he earned All-American honors in track and field three times and was the first at the university to do so.

As a sports performance coach, he uses his expertise to create programs for track and field and Olympic lifting athletes and is certified through USA Weightlifting (USAW). Over the last 6 years, Jon has helped athletes find homes at Maryland University, Penn State, Wake Forest, Auburn and Georgia with over $1 million in scholarships.

Since 1995, Jon has been ranked in the top 30 in the country at the USA Track and Field Championships. His personal bests are finishing fourth indoors and eighth outdoors. As a competitive athlete, he’s also pursued long snapping at the NFL level with Gary Zauner, a 13 year NFL Special Teams Coordinator.

Ken Potis


Ken has been a trainer at Critical Mass Training Systems since 2015. Ken grew up competing in a variety of sports, including baseball at the high school and college level. His love for competition would soon evolve into a love of coaching, as he began coaching youth baseball camps every summer through high school and college and beyond. He applies these experiences to his coaching to this day, believing that strength training should be treated like a skill in any other sport– with patience, good form, and lots of practice!

Ken graduated from the College of New Jersey in 2012 with a B.A. in Communication Studies, and is a Certified fitness Trainer through World Instructor Training Schools. He currently trains for strength and competes in power-lifting events. His favorite part of coaching at Critical Mass is helping build confidence in his clients and seeing that “A-ha” moment when they learn a new movement or achieve a personal best. Ken currently teaches strength classes, HIIT classes, and one-on -one sessions.

Richard Bohnert


Richard “RJ” Bohnert CSCS, USA-W1 is a personal trainer / sports performance coach. He graduated from West Chester University, Pennsylvania with a Bachelor’s Degree of Exercise Science. There he was able to work with the University’s basketball and softball team.

Following graduation, he continued his education by receiving certifications from USA Weightlifting as a USA-W1 instructor as well as a Certified Strength & Conditioning Specialist (CSCS) as per the National Strength & Conditioning Association (NSCA). With over 700 hours of intern hours plus continuing education, his knowledge ranges from Adult fitness, athletic performance at the collegiate level, and developing the youth athlete. In his spare time, he still enjoys playing sports by competing in baseball and softball leagues as well as taking up the game of golf.

Lisa Perry 


Lisa has been a consistent presence here at Critical Mass. She is very much into Power Lifting and Yoga. Lisa began practicing Yoga in 2001 and drifted towards the practice of Iyengar Yoga. By paying close attention to anatomical details and the alignment of each posture, Iyengar Yoga is the practice of precision. Poses are held for long periods and often modified with props (blocks, bands, chairs etc). This method is designed to systematically cultivate strength, flexibility, stability, and awareness, and can be therapeutic for specific conditions.