OUR TEAM
Adam Sienkiewicz
General Manager
Adam joined Total Form Fitness in 2007 and currently serves as Manager of the gym. Originally from Poland, Adam was a nationally renowned Judo player. As a junior, Adam won bronze and silver medals at the Judo National Championships. Adam's success continued as an adult when he won bronze and silver medals at Poland's National Judo Championships. Upon coming to America in 2005, Adam earned his certification to become a personal fitness instructor. Soon after gaining his certification, Adam proceeded in his studies of physical fitness and worked to gain a certification as a Golf Fitness Instructor from Titleist Performance Institute (TPI). Adam's thirst for knowledge and passion for work is part of what makes him a valuable member of the Total Form Fitness team. He is enthusiastic, energetic, and works to help clients reach their physical fitness potential all while having fun.
David Gerena
David Gerena is a Westchester native, originally from the inner city, currently residing in Harrison NY. Gerena’s athletic career and journey began fairly early - from grade school up until now, participating in many sports. His main love has been Basketball, Football and Boxing which has lead him to learn about strength and conditioning to be a better athlete in High School. He learned so much throughout his own career path and after battling some major injuries, he had to work closely with an athletic trainer that eventually became his role model and got David motivated to go into the athletic trainer field. David continued his passion for fitness; becoming a Physical Therapist Aide where he got the opportunity to learn things from a new perspective. David extensive physical training background makes him a great addition to our TFF family.
Michael Julian Mercier
Michael Julian Mercier, born and raised in Boston, Massachusetts relocated to Yonkers, New York in 2020. Michael has been an athlete all his life, played multiple sports; basketball, football, soccer, swimming, lacrosse, baseball and many others. However, basketball out of all of the sports, has been the one he loved to play competitively. Michael started weight training in 2019, just to become stronger and look good and soon enough fell in love with Crossfit, which lead to his passion to become a personal trainer. His love for all types of training such as Olympic Weightlifting, Powerlifting, Endurance Training, direct his life to become a fitness instructor. He is a youthful, energetic and always ready to learn and go above and beyond. He is a great addition to our TFF family.
Tybarius Davis
Davis joined Total Form Fitness in January 2024. Residing in Rockland County, NY; Tybarious was an exceptional multi-sport athlete. In football, Tybarius dominated both sides of the ball achieving three times all-county, all-league, and two times all-section and all-state. As a wrestler Tynarious dominated the 195 lb weight class, Winning counties, and sections, and being the runner-up in the state of NY multiple times. He would finish his career with 152 wins and multiple MVP awards. His most prideful achievement was being able to represent Nyack High School school and being a nominee for the best male athlete in the state of NY. His love for sports allowed him to compete in Division One football at Colorado State University as well as further his education. Playing at a high level Tybarius was able to train with elite-level athletes as well as train under great strength and conditioning coaches. Being a part of that atmosphere motivated Tybarious to earn his certification in Nasm Personal Training and AFAA group Fitness. He is energetic and passionate about his career and eager to learn. Tybarius's attributes and drive to benefit others make him a great addition to the TFF family.
Jake Katz
Jake Katz, born and raised in New City, Rockland County, has always been passionate about sports, athletic training, and Olympic weightlifting. During his high school years, Jake excelled in football, earning all-league and all-conference honors. Additionally, he showcased his skills on the basketball court as a two-year starter for Clarkstown North High School. Following high school, Jake decided to focus his athletic abilities on football and became a two-year starter for Wilkes University as a tight end. His passion for athletic training and Olympic weightlifting began in his teenage years but intensified in 2018 as he prepared for college athletics. Jake is actively dedicated to developing his own strength, agility , speed, and mobility. More importantly, he is committed to ensuring the success and happiness of his clients in their day-to-day lives. With his energetic attitude and determined mindset, Jake will undoubtedly be a valuable addition to our Total Form Fitness White Plains family.