About ProActive PTSR

At ProActive Physical Therapy & Sports Rehabilitation, we provide much more than just outstanding “Physical Therapy.” When you visit, you’ll experience services that you will not find anywhere else.

Dedicated to helping you feel better.

Our hands-on care is only performed by licensed physical therapists who involve you at every step, education and guiding you about your rehabilitation, to ensure the best recovery possible. Our warm and friendly environment will help you feel comfortable while you restore function, alleviate pain and enhance performance. Also, we keep your doctor informed regarding your progress. Most importantly, we make ourselves available when you need us. so you can start feeling better as soon as possible. It’s the perfect place to get on the road to recovery.


Testimonials go here

Make an Appointment

Regardless of your condition, we recognize that it’s crucial to patient satisfaction to offer convenient hours centered around your busy lifestyle. We take every effort to minimize waiting room time and get you into treatment as soon as possible.

Or use our contact form. We’ll get back to you as soon as possible!

The Therapists

Our warm and friendly environment will help you feel comfortable while you restore function, alleviate pain and enhance performance.

hover background

Demetrios Farmakopoulos, MSPT, OCS

ProActive Physical Therapy’s founder, Demetrios Farmakopoulos, received his Master’s degree in Physical Therapy from Ithaca College. He is also a Orthopaedic Clinical Specialist, certified by the American Physical Therapy Association. Demetrios has practiced extensively with a number of master clinicians and with the area’s top orthopaedic and neurosurgeons. He has been in private practice for almost 20 years, making him uniquely qualified to handle a spectrum of orthopaedic and neurological needs. “I’ve been involved in competitive sports including basketball, rugby, footballl triathlons, and mountain biking, and focus my sports rehab on improving on-field functioning. I believe that hands-on manual therapy supports a trued connection with the patient and the best possible care.” As well as being in private practice, Demetrios is a member of the American Physical Therapy Association, and Rotary International.

hover background

Tunde Guttengeber, MSPT

Tunde graduated from Mercy College with a B.S. in Health Science in 2001 and with a Master of Physical Therapy degree in 2004. She is experienced primarily in outpatient orthopedics treating surgical and non-surgical conditions. She has also worked in long-term, sub-acute and inpatient rehabilitation settings for 10 years. Her interests include treatment of various injuries including shoulder problems, joint replacements, sports and work injuries, as well as chronic pain and the promotion of overall health and wellness. She has completed many continuing education courses such as Kinesio Taping, shoulder rehab, spine rehab, yoga and Pilates. In her free time she likes to read, work out, and she enjoys cooking and baking as a form of relaxation.

hover background

Kaelyn Ragonese

Kaelyn Ragonese received her Doctorate of Physical Therapy from Franklin Pierce University and Bachelors in Exercise Science from Hofstra University. She holds certifications in LSVT Big and the Graston Technique. Kaelyn believes in blending manual therapy with an evidence-based approach to exercise in order to yield the best results. She is passionate about educating her patients on their condition and different lifestyle adjustments in order to promote independence on their journey towards an optimal level of function. In her free time, she enjoys playing intramural sports, spending time with her friends and family, and traveling to new places.

hover background

Rana Lowenthal

Rana Lowenthal received her Doctorate of Physical Therapy from Columbia University. She has worked in a diverse array of settings including inpatient rehabilitation, sub acute rehabilitation, acute care and hospital based outpatient prior to joining the team at Proactive PTSR. Rana is currently involved in post graduate coursework in order to pursue her interest in pelvic floor physical therapy, with particular emphasis in pregnancy and postpartum. In her spare time, she enjoys singing, long chats with friends, and spending time with her husband and two young children.


Hands on Therapy, with a personalized, and attentive approach. Our goal is to help you achieve yours.

Massage Therapy

Private appointments are available for on site massage therapy.

Personal Training

Our certified personal trainers will customize an exercise program to assist you in achieving your fitness goals.

Post Physical Therapy Exercise Program

Once patients are discharged from physical therapy, they are encouraged to continue with an independent exercise program to maintain their improved health. Accordingly, ProActive Physical Therapy and Sports Rehabilitation now offers the use of our gym to former patients. All activity is under our supervision, and available for a modest monthly fee.

Certified Hand Therapy

Patients that have had significant injury to their hand, wrist, elbow or shoulder can benefit from this specialized form of physical therapy. Certified Hand Therapist Demetrios Farmakopoulos, one of only a few thousand in the country, can help you maximize mobility and restore functionality to these critical areas so you can execute everyday tasks. ProActive Physical Therapy and Sports Rehabilitation is proud to offer this exclusive treatment program to help our patients maintain their quality of life.

Neurological Injury Rehabilitation

Our therapists use a hands-on approach to reeducate and facilitate return of normal movement patterns for patients who have sustained neurological injuries. We recognize that rehabilitation programs are designed differently for each patient depending on their diagnoses. Conditions treated include: Stroke, Parkinson’s, Multiple sclerosis, Guillan Barre Syndrome, Bell’s Palsy.

Spinal Rehabilitation

Our highly-skilled physical therapists have in depth knowledge in recognizing and treating movement dysfunctions. With a thorough evaluation of each patient’s mobility and muscular weaknesses, we are able to customize a program that meets your exact needs. We educate our patients on correct sitting and standing posture as well as proper body mechanics to prevent future injuries.

Pre-Sport Conditioning and Training Programs

ProActive Physical Therapy & Sports Rehabilitation helps athletes focus on their performance while preventing injuries. We offer programs for both recreational and experienced athletes including:
  • Endurance training and training theory
  • Flexibility and balance
  • Neuromuscular control and coordination
  • Strengthening
  • Focusing on your body’s own signs and signals

Pre and Post Surgical Rehabilitation

ProActive Physical Therapy & Sports Rehabilitation offers comprehensive rehabilitation programs for all orthopaedic pre and post surgical procedures. Whether you are recovering from surgery, a joint replacement or other procedure, our goal is to help you restore function, promote healing and get you moving as quickly as possible. We strive to educate you about your condition and recovery so you have all the tools to help yourself. Our pre-operative education and rehabilitation provides an alternative for patients who want to avoid surgery or for patients who plan to have surgery in the future. We will take time, provide a free consultation, and answer your questions regarding your condition.

Sports Injury Prevention and Rehabilitation

Our approach to managing sports injuries focuses on helping you restore flexibility, strength, power and endurance. We design your rehabilitation program to be sport specific, and prepare you to return to competing, stronger and quicker. Even more important, we offer Sports Injury prevention and conditioning workshops that will keep you in the game. We treat a variety of athletes including: • Runners • Swimmers • Cyclists • Football players • Basketball players • Rugby players • Golfers • Dancers • Tennis and racquetball players • Baseball and softball players • Hockey players • Skiers and snowboarders • Walkers

Get in touch

Thanks for looking. We’d love to hear from you.

Contact Information

ProActive Physical Therapy and Sports Rehabilitation PLLC
465 Columbus Avenue
Valhalla, NY 10595

Email: proactiveptsr@gmail.com

Phone: 914-741-2850
Fax: 914-741-2851

Monday - Friday:
7 am to 8pm
9 am to 1 pm

Drop Us a Line

We will get back to you asap. Fields marked with * are required.