Image by Annie Spratt

Meet the team

We are committed to helping you
reach the goals you've always wanted

Stay Fit’s expert team consists of Physical Therapists, Certified Personal Trainers, Nutritionists, Counselors, as well as a talented team of office personnel. 

Meet Your Head Coach


Hi. I’m Diana Sahakian, a physical therapist with 20 years of experience, counsellor and business owner for 15 years. My own struggle with chronic pain and movement asymmetries and my journey to overcome physical challenges made me passionate about helping and empowering individuals to develop strategies to improve their health, wellness, exercise, eating, weight and stress management as well as emotional well-being.


I know that we lead busy and chaotic lives where we run ourselves down and wear ourselves out. We experience injuries, lack motivation and stop believing in what our bodies were meant to do. I’m here to guide you from assessing your current physical and emotional state to setting goals for your health and wellness and creating actions steps to achieve them.


Whether you’re a leader or stay-at-home mom, I’ll help you fulfill your potential through mindset and behavior change from a Christian perspective.

Diana's credentials

Diana is the founder of Stay Fit (est. 2006). She earned a Master’s Degree in Physical Therapy from Northwestern University Medical School (1999) and a Master of Science in Counseling (1997).

Diana has over 20 years of experience as a physical therapist and has been a small business owner for over 15 years. Her area of expertise is in the rehabilitation of the spine, and she works in restoring neutral biomechanics to prevent injury and to assist clients in moving safely and freely. She is particularly interested in chronic pain cases and is successful in restoring an active lifestyle for clients no matter what their history is. She uses her Pilates training with traditional physical therapy to achieve optimal results.
Diana also combines her counseling and physical therapy skills by offering wellness consulting services to help individuals achieve optimal wellness every day. She is a certified nutritional physical therapist and enjoys helping people on their long term weight loss journey through physical therapy.

Diana’s own struggles with chronic pain, weight management and movement asymmetries and her journey to overcome physical challenges have made her passionate about helping and empowering individuals to develop strategies to improve their health, wellness, exercise, eating, weight and stress management as well as emotional well-being.
Diana is married to Rafi and has three boys, Micah, Benjamin and Samuel. She enjoys the sun, the beach, running and traveling. Her goal in life is to honor God in all she does and to enjoy every part of the journey!

Lisa Harman, Personal Trainer

Lisa has been part of the Stay Fit team since 2006. She is a licensed Massage Therapist with 25 years of experience. Five years ago, Lisa earned her licensure as a Physical Therapist Assistant and Certified Personal Trainer and enjoys wearing all these hats at Stay Fit.


Lisa is also a Certified Health and Nutrition Coach with a desire to help her clients fulfill their personal health and wellness goals by coaching them through movement, nutrition education and implement healthy lifestyle habits by using Stay Fit’s 5 Principle Method. 


Lisa lives with her husband in Glenview and enjoys working out, traveling and spending quality time with family and friends.