Individual first
Programming starts with the client’s goals, current ability, training history, and schedule.
About Breakthrough Fitness
Personal coaching should feel personal.
Thoughtful programming, close attention, and a welcoming training culture for clients across experience levels.
Explore coachingStrength · consistency · confidence
What the brand stands for
Progress without the performance.
The work can be serious without the atmosphere becoming intimidating, impersonal, or built around someone else’s idea of fitness.
Purpose over noise
Exercises, progressions, and habits should have a reason—not exist to make training look complicated.
Respect is standard
Breakthrough Fitness is professional and welcoming across backgrounds, identities, and experience levels.
Founder & head coach
Mark Castilletti
B.S.Kinesiology & Exercise Science
ACECertified Personal Trainer
12+Years coaching
D1Former track & field athlete
About Mark
Performance knowledge applied to real life.
Mark founded Breakthrough Fitness to provide individualized coaching that is difficult to deliver in a crowded, one-size-fits-all environment.
He holds a B.S. in Kinesiology and Exercise Science from the University of Rhode Island and is an ACE Certified Personal Trainer. Across more than 12 years, he has coached clients from youth through older adulthood in commercial gyms and mobile training settings.
As a former Division I track and field athlete, Mark set multiple school records and won four championship titles. That performance background informs his understanding of movement and progression; his coaching applies it to each client’s real goals.
Built to grow
The brand is larger than any one coach.
Mark is the founder and current head coach. Breakthrough Fitness is structured as a business that can expand its team while preserving the same standards for personal attention, thoughtful programming, and client respect.
Ready to begin?