Our Studio Location


Fitness TogetherBoston Back Bay
36 Newbury St
Boston, MA   02116
p. (617) 247-3900
Fitness Together$99 to $199
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Mon - Fri   6:00 AM - 9:00 PM
Sat   7:30 AM - 4:00 PM
Sun   Closed

Our Staff

Get to know our friendly Fitness Together® Personal Training Staff at Boston Back Bay.

Nathan Partridge
Nathan Partridge

Nathan Partridge

Owner N.S.C.A. CSCS N.A.S.M. CES

Nathan (Nate) graduated from St. Joseph’s College of Maine in 2007 with a degree in Sport Management.  Fitness and wellness became a part of Nate’s lifestyle during his early college years, having felt personal benefits of fitness he wanted to help others experience its power as well.  During college he got certified and quickly started helping others at a local gym by St. Joseph’s.

After graduation Nate took his certification a step further and got certified through the National Strength and Conditioning Association as a Certified Strength and Conditioning Specialist.  Realizing that Corrective Exercise was vitally important, he got certified through the National Academy of Sports Medicine with a Corrective Exercise Specialist certification. Integrating these two certifications Nate has helped create programs to fit the needs of clients of all shapes and sizes. Above all else, Nate wants to help people live and feel better.

A huge sports fan and former professional natural bodybuilder, Nate enjoys playing, watching and participating in almost all athletic adventures.  Baseball, football and golf are his all-time favorites.  Ask him a stat, chances are he’ll know it!

“Nothing can stop the man with the right mental attitude from achieving his goal; nothing on earth can help the man with the wrong mental attitude.”


Courtney Cronin
Courtney Cronin

Courtney Cronin

Assistant Manager -- ACE-CPT

Courtney, who graduated with a degree in Psychology from the University of New Hampshire, eagerly joined the Fitness Together Back Bay team with a sincere passion (and a smile!) to help others and change lives.  An advocate for health, wellness and internal satisfaction, she brought her long term personal passion to the professional setting.

Courtney was a competitive soccer player for years and competed in several natural bodybuilding competitions before returning her athletic ambitions to her very first fitness love: distance running.  She recently completed a half marathon and a few other road races and is always looking for company on these weekend trots! 

Recognizing the sincere importance of not only exercising for aesthetic purposes but long term function, internal well-being and personal happiness is something Courtney is extremely passionate about.  She believes a balance of nutrition, physical activity and positive self-image is the vital collaboration for long term health and happiness and is beyond grateful to share and foster that message with the clients of FT Back Bay.



Jason Jarett
Jason Jarett

Jason Jarett

Fitness Coach -- ACSM-CPT

Jason graduated from the University of Connecticut in 2009 with a B.A. in Psychology but it wasn’t until a few years later that he pursued a career in fitness. Having played soccer, basketball and baseball in high school and recreationally in college, athletics and training were always an interest of his. It wasn’t until he graduated, struggled to find a career path, and gained a lot of stress weight that he decided to make fitness a staple in his life. He started his own weight loss journey and along the way discovered he wanted to help people in similar situations to his.

He worked hard to save up money to move to Boston to attend the American Academy of Personal Training where he graduated and was able to become a Certified Personal Trainer through the American College of Sports Medicine.

With and abundance of personal experience with weight loss and life struggles, Jason is quite qualified and willing to help anyone with their own fitness journey and will do so with passion and enthusiasm.

When Jason isn’t changing people’s lives in the gym, he loves to be active. He loves Obstacle Course Racing and frequently trains and races for Spartan Race and Tough Mudder. He loves to golf, hike, play soccer, softball, football and basketball. He’ll visit his hometown of Lake George, NY whenever he can to swim, water-ski, tube, and cliff jump in the natural playground that is Lake George.