Stay Fit Team

Stay Fit’s expert team consists of Physical Therapists, Licensed Massage Therapists, Certified Personal Trainers, as well as a talented team of office personnel. We are all wholeheartedly dedicated to making your experience at Stay Fit warm and inviting, and we are diligently committed to helping you Get Fit and Stay Fit by enhancing the health of your mind, body, and spirit.  As an added benefit, our team is fluent in English, Spanish, French, Polish, and Arabic.

Diana Sahakian

Founder, Physical Therapist

Diana founded Stay Fit in 2006, inspired by her father, a plastic surgeon.  She pursued a medical career and, in 1999, earned a Master’s Degree in Physical Therapy from Northwestern University Medical School. Diana also has a Master of Science in Counseling that she earned in 1997.

Alex Adams

Physical Therapist

Alex joined our Stay Fit team in July 2014. She earned her Doctorate of Physical Therapy from Southwest Baptist University in Bolivar, Missouri. She believes in helping her patients building a healthy brain and body.

Samantha Quinain

Physical Therapist

Samantha earned her Bachelor’s degree in Physical Therapy at Silliman University in the Philippines in 2013. She migrated to the US in 2015 and has since been practicing physical therapy. She is currently finishing her Doctorate degree in PT (spring of 2020), and her goal is to help people move without pain and guide them achieve and maintain a healthy lifestyle.

Lisa Harman

Physical Therapy Assistant, Licensed Massage Therapist

Lisa has been part of the Stay Fit team since 2006.  She has been a licensed massage therapist for 23 years. She also earned her licensure as a physical therapist assistant from Oakton Community College in 2015 as well as becoming a certified personal trainer. 

Sian Nolan

Licensed Massage Therapist & Certified Personal Trainer

Sian is a Licensed Massage Therapist and Certified Personal Trainer. She received her NCTMB Certification in Massage Therapy in 2007 and joined the Stay Fit Team soon after, in Feb 2008. In 2009, Sian became a Certified Personal Trainer through the American Council on Exercise.

Jill Hansen

Licensed Massage Therapist

Jill is a Licensed Massage Therapist and graduated from the School of Holistic Massage and Reflexology in Downers Grove. She is interested in healing the mind, body and spirit with her massage. 

She holds a Master’s degree in Social Work and was a counselor for several years. 

Daisy Lancaster

Billing and Collections Coordinator
Daisy joined the Stay Fit team in February 2020 as Billing and Collections Coordinator. She looks forward to working with Stay Fit clients to facilitate the insurance claims process in a timely manner.

She enjoys connecting with people and is excited to be part of the positive environment at Stay Fit.

Olivia Napierala


Olivia obtained an Associate’s Degree in Applied Science from Harper College. She is currently a student at Roosevelt University in the Health Science Administration program. Olivia is fluent in Polish and enjoys working with people.  She loves to encourage patients and clients to have a positive mindset.


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127 W. Prospect Avenue, Mt Prospect, IL 60056

© 2006 - 2021 Stay FIt Physcal Therapy & Core Wellness, Inc.