Board Certified Chiropractic Sports Physician

Clinic Director of Back to Health Chiropractic PC

Dr. Marc Dupuis, originally from southern Connecticut, relocated with his family to Sanford, Maine as a youth where he attended local schools and graduated from Sanford High School. Dr. Dupuis completed his undergraduate studies at the University of Maine at Orono, where he received a bachelor’s degree in Biology. Following his graduation from UMaine, he realized his passion was to work with people and health care seemed like a natural fit to combine his background in science and research while helping people achieve optimum health. While preparing to attend graduate school in an allopathic medical program, Dr. Dupuis gained hands on experience with patient care while working as an Emergency Medical Technician. It was during this time as an EMT that he developed back pain as a result of repetitive lifting of patients. Dr. Dupuis decided to see his family’s chiropractor and after one visit, he felt significant relief! Perhaps what was more surprising was that after a few visits he noticed improvements in his running and biking. This experience prompted Dr. Dupuis to shift his academic plans and attend graduate school at New York Chiropractic College. The Chiropractic Philosophy of helping individuals achieve health naturally without the use of drugs or surgery and its role in performance improvement of athletes resonated well with Dr. Dupuis’ own views on health.In 2003, Dr. Dupuis graduated Magna Cum Laude from New York Chiropractic College, in Seneca Falls, New York.Dr. Dupuis completed his intership at the Camp Geiger School of Infantry & the Camp LeJune Naval Hosptial, both located within the Camp LeJune United States Marine Base, Jacksonville, NC.In the winter of 2004, Dr. Dupuis was pleased to return to Maine where opened his practice, Back to Health Chiropractic, focusing on family care, athletic performance, injury prevention/treatment and rehabilitation.Dr. Dupuis had the privilege to study Elite Sports Science at the United States Olympic training center in Lake Placid, New York.Since the summer of 2007, Dr. Dupuis has functioned as Team Chiropractor for the Sanford Mainer’s Baseball Team, part of the New England College Baseball League.Recently, Dr. Dupuis served as chiropractor for the United States Bobsled & Skeleton Teams at the United States Olympic Training Center in Lake Placid, New York & in Washington DC for the NCAA National Tae Kwon Do Championships.

Additional Training/Certifications

Since 2003, Dr. Dupuis has dedicated numerous hours of continuing education on the topics of whole food nutrition, therapeutic herbs and nutrition counseling.In November of 2011, Dr. Dupuis earned the postgraduate designation of Certified Chiropractic Sports Physician® (CCSP®) by the American Chiropractic Board of Sports Physicians™ (ACBSP™). The CCSP® certification requires the doctor to attend a minimum of 100 hours of a 120 hour postgraduate program. This instruction is specific to physical fitness and the evaluation and treatment of injuries encountered in sports. Following the completion of these hours, the doctor must then take and successfully pass a comprehensive written examination.In February of 2015 Dr. Dupuis earned the postgraduate designation of International Chiropractic Sports Physician.Dr. Dupuis is a certified Impulse Instrument adjusting chiropractor and is certified in the Webster Technique for pregnant patients. Dr. Dupuis also has advanced training in the application of Kinesio Tape.

Outside Interests

Dr. Dupuis enjoys leading an active lifestyle in various outdoor activities such as biking, hiking, running, skiing and surfing. He regularly competes in triathlons. Dr. Dupuis is a seven-time half Iron distance finisher and is a two time finisher at Ironman Lake Placid. Dr. Dupuis is a member of the American Chiropractic Association, American Chiropractic Association's Sports Council, International Chiropractic Association, International Chiropractic Pediatric Associate, Kennebunk Beach Triathlon Club, Maine Chiropractic Association, Sanford-Springvale Chamber of Commerce..




Dr. Brennin is originally from New Durham, New Hampshire. He recently graduated from Logan University and came back to New England to join our team at Back to Health Chiropractic. Dr. Brennin has a strong passion for promoting holistic health and wellness. Outside of practice, Dr. Brennin enjoys gardening, immersing himself in nature, and taking walks with his two dogs. 

Laura is our Office Manager at Back to Health Chiropractic. She joined our practice in October of 2019. Laura has been a Chiropractic Assistant since 2011. She grew up in Chiropractic Care as her uncle was a Chiropractor in Hampton, NH. Laura enjoys working with patients in all aspects of their care. Outside of the office Laura enjoys riding motorcycles, attending concerts, movies, books, and most anything outdoors. She resides in Lebanon with her husband Scott, their boys Keegan and Logan, and dogs Chance and Rosemary.
















Autumn is a Chiropractic Assistant at Back to Health Chiropractic, who joined the team in June of 2022. Autumn enjoys helping patients through all phases of their care. Outside of the office Autumn enjoys spending time with her boyfriend Ryan and her nephews 

Kaila is a Chiropractic Assistant at Back to Health Chiropractic, who joined the team in August of 2022. Her goal in the office is to help patients live their best life. Kaila enjoys camping, fishing, traveling, and spending time with family, She lives in Sanford with her husband Adam, and their cats Bubba and Junior Mint.



Hector is our office mascot and social media manager. He is always camera ready, and enjoys reminding patients to be mindful of their posture when sitting in our waiting room. 

Corrective Chiropractic Care Mirror Image Spinal Traction
What truly sets Corrective Chiropractic care apart from traditional Chiropractic care is the added application of mirror image exercises, mirror image adjusting and what is highlighted in the image to the right: Mirror image traction. By using sophisticated, cutting edge, research backed methods we can actually change spinal alignment with the ultimate goal of moving each individual as close to ideal as possible for improved overall body function.

Axial Spinal Traction / Decompression
As an example of our commitment to having  the most research based, cutting edge equipment, we are pleased to offer Computerized Spinal Traction / Decompression. Our Dynatron DX2 Decompression Unit provides Targeted Traction / Decompression; automatically calculates and digitally displays the rope angle allowing us to focus treatment on either the upper, middle or lower regions of the cervical spine and lumbar spine. Computerized Spinal Traction / Decompression is an amazing therapy that can be applied to individuals with herniated cervical disks, herniated lumbar discs as well as those with advanced spinal degeneration. In December of 2007, the prestigious journal Spine in Vol. 32 No. 26 reported that patients with low back pain, leg symptoms and signs of nerve root compression were likely to benefit from mechanical traction. 

What conditions do chiropractors treat?

Chiropractic is a health care profession that is focused on improving one's overall health through natural means without the use of drugs or surgery. Chiropractic treatment is aimed at maximizing the body's own innate healing potential. Therefore people seek chiropractic care for assitance with a wide variety of health care conditions.

What type of education and training do chiropractors have?

Chiropractors are educated as primary contact health care practitioners, with an emphasis on musculoskeletal diagnosis and treatment. Educational requirements for doctors of chiropractic are among the most stringent of any of the health care professions. The typical applicant at a chiropractic college has already acquired nearly four years of pre-medical undergraduate college education, including courses in biology, inorganic and organic chemistry, physics, psychology and related lab work. Once accepted into an accredited chiropractic college, the requirements become even more demanding — four to five academic years of professional study are the standard. Because of the hands-on nature of chiropractic, and the intricate adjusting techniques, a significant portion of time is spent in clinical training.In total, the chiropractic curriculum includes a minimum of 4,200 hours of classroom, laboratory and clinical experience. The course of study is approved by an accrediting agency that is fully recognized by the U.S. Department of Education.

Does chiropractic treatment require a referral from an MD?

No, a patient does not need a referral by an MD before visiting a doctor of chiropractic. Chiropractors are first contact physicians, and are so defined in federal and state regulations. Following a consultation and examination, the doctor of chiropractic will arrive at a diagnosis under chiropractic care, or refer the patient to the appropriate health care provider.

Is chiropractic treatment safe?

Chiropractic is widely recognized as one of the safest drug-free, non-invasive therapies available for the treatment of neuromusculoskeletal complaints. Although chiropractic has an excellent safety record, no health treatment is completely free of potential adverse effects.The risks associated with chiropractic, however, are very small. Many patients feel immediate relief following chiropractic treatment, but some may experience mild soreness or aching, just as they do after some forms of exercise. Current literature shows that minor discomfort or soreness following spinal manipulation typically fades within 24 hours.Neck pain and some types of headaches are treated through precise cervical manipulation. Cervical manipulation, often called a neck adjustment, works to improve joint mobility in the neck, restoring range of motion and reducing muscle spasm, which helps relieve pressure and tension.Neck manipulation is a remarkably safe procedure. While some reports have associated upper high-velocity neck manipulation with a certain kind of stroke, or vertebral artery dissection, there is not yet a clear understanding of the connection. The occurrence appears to be very rare—1 in 5.85 million manipulations— based on the clinical reports and scientific studies to date. If you are visiting your doctor of chiropractic with upper-neck pain or headache, be very specific about your symptoms. This will help your doctor of chiropractic offer the safest and most effective treatment, even if it involves referral to another health care provider.It is important for patients to understand the risks associated with some of the most common treatments for musculoskeletal pain -- prescription and over-the-counter nonsteroidal anti-inflammatory drugs (NSAIDS) -- as these treatments may carry risks significantly greater than those of chiropractic manipulation. According to a study from the American Journal of Gastroenterology, approximately one-third of all hospitalizations and deaths related to gastrointestinal bleeding can be attributed to the use of aspirin or NSAID painkillers like ibuprofen.


Is chiropractic treatment appropriate for children?

Yes, children can benefit from chiropractic care. Children are very physically active and experience many types of falls and blows from activities of daily living as well as from participating in sports. Injuries such as these may cause many symptoms including back and neck pain, stiffness, soreness or discomfort. Chiropractic care is always adapted to the individual patient. It is a highly skilled treatment, and in the case of children, very gentle.

Do insurance plans cover chiropractic?

The majority of all insured American workers have coverage for chiropractic services in their health care plans. For example, the federal government’s Office of Personnel Management offers chiropractic coverage for federal employees in both the Mail Handlers and BCBS benefit plans. In addition, there is a chiropractic benefit in Federal Workers’ Compensation, and chiropractic care is available to members of the armed forces at more than 40 military bases, and is available at nearly 30 veterans’ medical facilities.

Is chiropractic treatment ongoing?

The hands-on nature of the chiropractic treatment is essentially what requires patients to visit the chiropractor a number of times. To be treated by a chiropractor, a patient needs to be in his or her office. In contrast, a course of treatment from medical doctors often involves a pre-established plan that is conducted at home (i.e. taking a course of antibiotics once a day for a couple of weeks). A chiropractor may provide acute, chronic, and/or preventive care thus making a certain number of visits sometimes necessary. Your doctor of chiropractic should tell you the extent of treatment recommended and how long you can expect it to last.

Why is there a popping sound when a joint is adjusted?

Adjustment of a joint may result in release of a gas bubble between the joints that makes a popping sound – it’s exactly the same as when you "crack" your knuckles. The noise is caused by the change of pressure within the joint that results in gas bubbles being released. There is no pain involved.