meet our professionals

Jennifer Kyritsis Balducci, PT, MSPT, Cert. MDT, LSVT BIG®

Jennifer received a master’s degree in physical therapy from Boston University in 1997. A New Jersey native, she settled in Annapolis in 2001 because of her love of history and the water. Jennifer was site manager of Fitness Forum Physical Therapy from 2002-2008. During this time she became certified in Mechanical Diagnosis and Therapy (MDT), the McKenzie Method for the treatment of neck and back pain. She uses this technique to promote healing for the entire body by educating her clients in self-treatment, postural correction, postural alignment, and injury prevention.


Since 2008, Jennifer has focused on bridging the gap between post-injury physical therapy treatment and personal training by guiding her clients to achieve all of their wellness and fitness goals. As co-owner of One. Incorporated, she continues her tradition of treating the whole body without the limitations imposed by insurance companies.


One. is dedicated to Jennifer’s father, who passed away in 2013, and to her family and friends who continue to provide their unconditional support and love.

Christina Thomas, PTA, LSVT BIG®

Christina, co-owner of One. Incorporated, has been in the fitness industry for over 20 years. Her first certification was through AFAA as a group fitness instructor. She worked at Merritt Athletic Club as a fitness instructor while finishing her associate degree as a Physical Therapist Assistant. After graduating from Delaware Technical Community College, she and her husband relocated to Annapolis. She began working at Fitness Forum Physical Therapy in 2005 until 2013 where she worked with a variety of patients with all types of orthopedic conditions. With the knowledge she gained at Fitness Forum she opened One. Physical Therapy with her business partner Jennifer Balducci in 2013. 

Christina has also completed McKenzie Therapy for Mechanical Low Back Pain Parts A-C, Pilates mat certification through Balance Body, and Balanced Body Reformer 1.  Christina has also been certified as a Kinesio Taping Practitioner and is an LSVT Big Certified Instructor.  She uses her extensive background and experience to give 110% to her clients.


Kristen Cooper, PT, DPT, CSCS, LMT

Kristen has over 15 years of experience, as well as diverse advanced training and certifications with a strong manual therapy focus to help you achieve your goals. She received her Bachelor's (BS) and Master's (MS) degrees in Physical Therapy from Ithaca College, and later went on to get her Doctorate of Physical Therapy (DPT) from Temple University.


She is a Certified Strength and Conditioning Specialist (CSCS) through the NSCA. Kristen additionally holds a degree as a Licensed Massage Therapist (LMT), and went through training to become a Certified Fertility Massage Therapist (CFMT). She completed courses to become a Certified Sports Nutrition Consultant and to obtain Pre and Post Natal Fitness Certifications through the AAIM and ISMA.


Kristen was one of the first therapists to introduce functional trigger point dry needling to the Greater Annapolis area, completing both beginner and advanced training in 2010 through Kinetacore. She has served as a mentor to other therapists learning this technique.  With her extensive experience, you can be sure your session will be both safe and effective.


Kristen married an avid sailboat racer in 2010, and enjoys being on the water in her free time.  She has a toddler that keeps her busy, and he is the love of her life. Athletics have always been a part of her life from soccer, softball, skiing, and rugby, to distance running in more recent years. 


Kristen's goal as a therapist it to learn about each patient and their individual life demands and goals, and find a treatment approach and regimen that works best for them.

Mary Christhilf

Mary Christhilf is a highly-trained and –experienced instructor, trainer and coach who provides one-on-one private Pilates sessions in a safe, friendly environment.  She has a solid record of achieving strong, positive results with her clients using exercises based on the classical method as taught by Joseph Pilates. 


Mary Christhilf has been in the fitness industry for more than twenty years, beginning her career as an aerobics instructor certified through AFFA. She is trained in Pilates through Peak, and  holds certifications in Reformer, Mat, Chair and Barrel. She also holds two Rehabilitation certifications in the newest equipment, the Corealign. Mary has worked with industry notables such as Elizabeth Larkam, Brent Anderson of Polestar, and Karena Thek of Scolio-Pialtes. She is an Ace-certified  Personal Trainer and Reiki-certified, and has worked with the TRX and Barre programs, integrating both with Pilates movements. 


As a result of working with clients who have been injured or are recovering from surgery, Mary Christhilf is now focused on movement for restoration and healing.  She holds advanced education certification in injuries and pathologies, and is certified in Breast Cancer and Pink Ribbon Pilates.  She is trained in mitigating the effects of scoliosis and has special experience with hip, knee and shoulder injuries and pathologies.  She has advanced training in working with Parkinson’s, MS and stroke clients.

>> More About Mary

Pia Minard, M.S., CTN, LMT

​Pia Minard, M.S., CTN, LMT has a varied background as a Certified Traditional Naturopath, a Licensed Massage Therapist and a rehabilitation therapist having over 25 years experience in the Health, Wellness, and the Rehabilitation field of service.  She is certified as a Traditional Naturopath (CTN) by the American Naturopathic Certification Board (ANCB), a Masters Degree in Natural Health and an Associate Degree in Occupational Therapy.


As a Massage Therapist, Pia is skilled in myofascial, deep tissue, craniosacral and reflexology techniques.  In addition she is a Reiki Master.  Pia uses an Integrative style to provide you, the client, a massage tailored to your specific needs.  


As a Certified Traditional Naturopath (CTN) her focus is on natural substances and techniques to optimize health and well-being.  Using computerized symptom survey analysis, specific areas of concern can be pinpointed and specifically addressed.  Having a broad base of knowledge in herbs, nutrition, aromatherapy, homeopathy, light therapy etc., means she is available for consultation to assist the client toward an individualized program focused on maximizing well-being.  


Pia, certified as a Tai Chi for Health Instructor, is available for private or small group Tai Chi for Health instruction.  Tai Chi for Health is an International Tai Chi Organization founded by Dr. Paul Lam.  It is designed to promote health, well-being, improve balance and quality of life through this ancient, gentle, yet proven effective method of exercise. 

Sue Clements

Sue Clements started working in the health and fitness industry in 1982 as a Fitness Trainer at the Severna Park Racquetball Club. She worked there for six years before moving to Annapolis where she then took on a position as a fitness trainer at the Merritt Athletic Club and within a year was holding the position of Fitness Director.  There she managed 15 trainers and the fitness center.

Sue earned her American College of Sports Medicine certificate as a Health Fitness Instructor/Exercise Specialist in 1992. 

She enjoys any outdoor activity and loves to work in her yard.

Sue also seeks volunteer opportunities and giving to the community.  She has coached youth basketball, lacrosse, soccer and volunteered as a Girls on the Run Coach for three seasons.

Sue is married with two kids and constantly pursues a balance of health, fitness, good nutrition and adventure!

Jeff Masenheimer, Lac

In 2011, Jeff Masenheimer graduated from Florida College of Integrative Medicine where he received his Bachelor's Degree in Professional Health Studies and his Master's Degree in Oriental Medicine. Jeff prides himself on his knowledge of Chinese herbs and his ability to develop formulas to help his patients. Along with herbs and acupuncture, Jeff is proficient in Tui Na (Chinese medical massage), cupping, and moxibustion therapy.

Jeff has been practicing Chinese health therapies since 2000. He has also studied tai chi, Qi Gong and martial arts. After studying tai chi for several years it seemed natural for Jeff to expand his knowledge of healing arts and follow in the footsteps of his uncles and brother and go into massage therapy. In 2005, he graduated from Central Florida School of Massage Therapy where he learned sports massage and myofascial release. Following massage school, Jeff worked for a pain and medical rehabilitation facility alongside a medical doctor, physical therapists and a chiropractor that primarily focused on clients who had been injured in automobile accidents. Jeff opened his own practice in 2007 in Florida and worked with a wide range of clients including geriatric, athletes and people with injuries. Jeff received his Associates of Arts Degree in 2008 from Valencia College so he could pursue his long term goal of becoming a licensed acupuncturist 

Jeff is devoted to helping clients achieve a healthy, balanced and pain-free life.

Judy Acosta, LMT

Judy Acosta is a Massage Therapist, Licensed in the state of Maryland. Judy attended the  Baltimore School of Massage 1995-1997 bringing over 20 years of experience to One.


Her past training has been focused in the “traditional”  deep tissue, swedish massage, sports massage and Myofascial Release.   Currently, Judy is enrolling in classes in manual therapy several times a year.  Monthly study groups also provide a continual educational approach to treat the body bio-mechanically that  helps other systems in the body to work together. Thus the goal is to have a well balanced system.


Judy is originally from the Pittsburgh area and relocated to the area in the early 1990’s.  She has a B.S. degree in Business. In her free time, she has been known to be an avid cyclist both road and mountain biking.  Hiking, camping and sailing are also some of her favorite outdoor activities. 

She has dealt with her my own injuries from broken bones and concussions, she truly understands the importance and the power that bodywork can truly make a more functional body. Good movement and posture go hand in hand.

Jonathan Ross

Jonathan's own personal journey of growing up with “800 Pounds of Parents” directly inspired Jonathan’s prolific fitness career. He is a multiple Personal Trainer of the Year Award-Winner (ACE, IDEA, and PFP Magazine), one of the original TRX Master Instructors, creator of Funtensity, brain fitness expert, blogger and master trainer for the American Council on Exercise (ACE). 


His classes are fun enough to change your mind, yet challenging enough to change your body.  His one-on-one fitness coaching uses 20+ years of experience to cover everything from posture and corrective exercise to willpower training to performance. 


His book, Abs Revealed, delivers a modern, intelligent approach to abdominal training. A former astronomer, Jonathan used to study stellar bodies – now he builds them!

Stacy Keith, DPT, PT, IMT

Stacy Keith is a Physical Therapist (PT) and Integrative Manual Therapist (IMT).  She began practice as a PT in 1997 after graduating from the University of Texas, Southwestern Medical Center in Dallas.  Stacy’s clients expressed frustration by limitations in conventional Physical Therapy.  She sought continuing education called Integrative Manual Therapy from 2004-2007.  Clients began reporting additional more satisfying outcomes as a result without the typical pain of conventional PT. She completed a Doctorate in Physical Therapy at Virginia Common Wealth University in 2012.


Her continued study and devotion to healing allows her to better discover the causes of pain or dysfunction, without invoking pain.   Her goal is to restore clients’ normal level of function.  She is able to gently decompress areas in the body to improve bony alignment, blood flow, nerve conduction, lymph drainage and facilitate restoration of organ movements and function. Many of her techniques are so gentle that many patients do not have an immediate sensation but see the effects several days later. 


Stacy has learned many ways that the human body can heal itself.  For example, “leaky gut” is a pathology wherein fluids leak from the gut directly into the blood stream. Surrounding tissues can compensate by physically adhering to the gut in order to patch the leaks. Often the gut will adhere to the lower spine or sacrum.  The bones create a natural splint in order to prevent further injury to the gut.  When bones adhere to the gut, they no longer move properly.  This presents as a “lock down” throughout the pelvis and lower spine.  Helping heal the gut and restoring mobility can then “unlock” areas restoring normal motion, joint space and nerve conduction. 


Joint injury can frequently be linked to a specific activity. The joint may have been set up over time related to other soft tissue injury or infection. When the soft tissues are not healthy (from illness, infection or toxicity) compensation patterns develop altering body mechanics of joints.  


Examples of what I have observed and successfully treated include:  

-  Mid back pain from a reduction in liver motion.

-  Right hip or shoulder pain from liver-related issues.

-  Left shoulder pain or changes in spinal posture from an injured spleen or pancreas. 

-  Bladder spasm resulting in overactive bladder.

-  Swallowing or reflux symptoms due to spasms and/or scar tissue in the throat or stomach.

-  Migraines from a spinal tap, followed by restoration of circulation in the area.

-  Chronic fatigue and brain fog improvements following liver and lymph treatment, resulting from improved circulation and system filtering. 

-  Sleep disruptions following multiple surgeries on a shoulder.  I have a series of techniques that allowed the full body to rebalance and detoxify.  . 

- Reductions in stress or panic responses following kidney and adrenal work. 


Those who have not responded or plateaued with regular treatment will often see additional improvements following work from IMT techniques. 


Stacy is committed and devoted to researching the body as a whole system and working to regain full function in all of her clients. 

Katie Mazur

Katie Mazur is a lifelong fitness and yoga enthusiast. Katie is certified in yoga (200 hr CRT), barre, Advanced Buti, Sculpt and Bands, Aerial Yoga, Paddle Board Yoga, and is a Master in Usui Reiki and Animal Reiki. In her free time, she enjoys cooking healthy, plant-based meals with her family, and traveling. Katie's goal is to make fitness accessible to health enthusiasts of all levels. 

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