Meet Your Team
DR. GABBY CALLAGY
PT, CSCS - FOUNDER
Gabby is a Doctor of Physical Therapy with advanced expertise in gait analysis, biomechanics, and athletic performance. She holds certifications as a Strength & Conditioning Specialist, Clinical Exercise Physiologist, and Pre & Postnatal Exercise Specialist. After earning a Bachelor’s in Exercise Science from the University of New Hampshire, she completed her DPT at the University of New England. Her passion for sports and biomechanics led her to specialize in treating runners, including three years at the renowned Spaulding National Running Center.
Outside the clinic, you’ll find her with her husband, 2 kids and their goldendoodle, Ziggy. A proud Boston sports fan and washed up basketball and soccer player, she still enjoys running and snowboarding. Her perfect day includes the beach, a good book, and a cold IPA.
Her PR’s include: Mile (6:02.9), 5k (21:42), ½ Marathon (1:52:54), Marathon (3:47:35)
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Gabby has worked with everyone from youth athletes to professionals and passionate weekend warriors, focusing on injury prevention, rehabilitation, and performance. Her clinical expertise has been featured in the International Journal of Sports Physical Therapy, where she published a case report on applying the Selective Functional Movement Assessment (SFMA) for athletes. She holds advanced training in manual therapy, spinal manipulation, dry needling, and pre/postnatal care.
Gabby also shares her knowledge with other providers and has presented on running gait analysis at conferences, including the Harvard Medical School Sports Medicine Conference.
After five years in the traditional healthcare system, Gabby founded The Run Rx to offer more personalized care and close the gap between rehab and lifelong performance for the modern athlete.
DR. MAGGIE MULLINS
PT, OCS, CFSC
SOMERVILLE CLINIC MANAGER
Maggie is a Doctor of Physical Therapy, Board-Certified Orthopedic Specialist, Certified Functional Strength Coach, and Run Coach. A Boston College alum and former Division I Track & Cross Country captain, she earned her DPT from UMass Lowell and completed an orthopedic residency at MGH Institute of Health Professions. Maggie brings a research-driven, collaborative, and runner-centered approach to everything she does — helping runners of all levels stay healthy, strong, and doing what they love.
When she’s not at The Run Rx, you’ll find her hanging out with her husband, family and friends. Her favorite things besides running include her cat Frankie, spending time in Cape Cod, New England Hazy IPA’s, and watching reruns of the Office and Schitt’s Creek.
Her PR’s include: Track 5k (16:59), Track 10k (36:25), ½ Marathon (1:21:28), Marathon (3:00:42)
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Maggie’s passion for running and performance extends far beyond the clinic. During her time at MGH IHP, she developed a continuing education course for her peers titled “Bone Stress Injury Prevention in Collegiate Distance Runners,” inspired by her own experience as a competitive runner and belief in the power of strength training.
She continues to compete post-collegiately with the Whirlaway Racing Team and has found a new love for marathoning. Maggie has also coached high school track & field and enjoys helping runners of all ages and experience levels reach their goals — from injury recovery to personal bests.
DR. JESS DANAHY
PT, Pelvic Floor Level 1, CSCS
Jess is a Doctor of Physical Therapy, Certified Strength & Conditioning Specialist and certified Run Coach with expertise in gait analysis and pelvic health. She specializes in both orthopedic and pelvic floor conditions and holds advanced certification through the Herman & Wallace Institute. Jess earned her Bachelor’s degree in Biology with a Pre-Medicine concentration from Framingham State before completing her DPT at Simmons University.
She’s especially passionate about helping active individuals, particularly pregnant and postpartum runners, stay strong, confident, and injury-free through all seasons of life. Jess completed a full-time clinical rotation in pelvic health and led the development of pelvic floor programs at two clinics. She regularly teaches workshops on pelvic health, running performance, and training theory.
When she’s not in the clinic or out for a run herself, you’ll find Jess exploring New England with her fiancé and goldendoodle, Koda. She loves curling up with a good book and visiting local breweries.
Her PR’s include: 5k (21:40), ½ marathon (1:38:55), Marathon (3:34:00)
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Jess’s background in competitive gymnastics and coaching laid the foundation for her movement expertise - but it was her love for running, sparked in college, that truly shaped her path. Since completing PT school, she has pursued advanced continuing education in running performance, pelvic health, and dry needling - and has personally shaved over 10 minutes off her half marathon PR.
She’s worked with active individuals of all ages, from youth athletes to older adults, and believes that great rehab, injury prevention, and performance care all share one foundation: a smart, strength-based approach rooted in evidence, empathy, and connection.
A self-described sponge for all things running-related, Jess brings that same energy and enthusiasm to every client she works with.
DR. MACKENZIE MURPHY
PT, OCS
Mackenzie is a Doctor of Physical Therapy and Board-Certified Orthopedic Specialist who earned her DPT from MGH Institute of Health Professions. Whether you’re lacing up for your first 5K or chasing your next BQ, Mackenzie’s goal is to partner with you to get — and keep — you running strong so you can crush every goal along the way.
With over five years of experience working with runners at Spaulding and the National Running Center, Mackenzie has treated everyone from weekend warriors to collegiate sprinters to Masters-level marathoners.
Outside the clinic, Mackenzie and her husband love exploring Boston’s patios and roof decks with a refreshing cocktail or IPA. She’s often out with her dog, Lucy — at agility class or on a new hiking trail — and on rainy days she’s curled up with a good book or binge-watching RuPaul’s Drag Race or Parks and Recreation.
Her PR’s include: 5k (19:46), ½ marathon (1:33:53), Marathon (3:18:01)
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A lifelong runner, Mackenzie pairs her passion for the sport with a deep interest in running-related research and injury prevention to deliver an evidence-based, holistic approach to care.
Since 2017, Mackenzie has trained with Boston’s Heartbreakers run club, where her curiosity about strength and conditioning fueled her own PRs and continues to inspire her work with athletes. She blends biomechanical insight with proactive injury prevention to help runners stay healthy, perform their best, and enjoy the sport for years to come.
