Our 1-on-1 treatment model means no techs, no aides and no wasted time in therapy. Each session is spent entirely with your Doctor of Physical Therapy who will create a personalized plan of care for you; no cookie cutter approach. This leads to less frequent visits, less time wasted and better outcomes. Our therapists specialize in keeping you participating in your favorite activities while working through your rehab and identifying the root cause of the issue to ensure long term results. 



Dr. Nick Hadinger


Dr. Nick Hadinger is a licensed physical therapist and Arizona native specializing in orthopedic and sports rehab. Nick graduated from Northern Arizona University as a Doctor of Physical Therapy and obtained his undergraduate degree in Physiology from the University of Arizona. He competed as a Division I athlete on the University of Arizona men's swim team and at the US Olympic Trials in 2012. He is currently training for Ironman Arizona 70.3.


Nick has experience in high level orthopedic and sports rehab with a wide range of clients from Ironman athletes, NFL and NBA players, Olympic medalists to weekend warriors. He is a member of the USA Swimming Sports Medicine Network; traveling with and treating Team USA athletes at various events. Nick is also a certified USA Weightlifting Coach, a member of the National Strength and Conditioning Association and works with swim teams in the Phoenix/Scottsdale area providing expert dryland programming. He has served as the Clinical Instructor for doctoral students attending George Fox University and University of the Pacific. 


Nick specializes in both non-operative and post-operative injuries involving the shoulder, back, hips and knees and aims to KEEP you active while addressing your injury.

In his free time he enjoys hiking, camping, swimming, cycling, working out in the gym, snowboarding and spending time with his 2 dogs and wife Lindsay. 

Degrees & Specialty Certifications

  • Doctor of Physical Therapy - Northern Arizona University

  • Bachelor of Science in Physiology - University of Arizona


  • USA Olympic Weightlifting Coach (USAW-1)

  • USA Swimming Sports Medicine Network

  • ​Certified in Blood Flow Restriction Therapy

  • Functional Movement Screen (FMS)

  • Advanced course work in NAIOMT (North American Institute of Orthopedic Manual Therapy)

  • RockTape Functional IASTM Certification (Instrument Assisted Soft Tissue Mobilization) 

  • RockTape Functional Taping Certifications


Dr. Ryan Spencer is originally from Long Island, NY and decided to move to Arizona in January of 2017. Ryan is a former football player, discus/shotput thrower, powerlifter and currently trains in Brazilian Jiu-Jitsu at Gracie Barra. You can find him most Friday evenings at his local gym staying late after trainings working on members to keep them healthy and on the mats! Ryan specializes in shoulder, neck and back injuries. He has experience treating thousands of patients from varying backgrounds but now focuses on treating active adults and athletes.

For over 2 years, Ryan was the director of an outpatient orthopedic clinic and became tired of the corporate setting. Frustrated with corporate demands, insurance restrictions and having his patients be a metric of profitability, Ryan decided to team up with Streamline Performance PT so he can truly give each patient the high-quality care they deserve.

Despite his many certifications, Ryan is always striving to improve his ability to help his patients and is currently enrolled in a program to become a Certified Orthopedic Manual Therapist (COMT), joining an elite group in top percentile of manual therapists in the country. In his free time Ryan enjoys training Jiu-Jitsu, walking his dog, weightlifting, reading and watching sports. Ryan is a die-hard NY sports fan including the Jets, Yankees, Rangers and Knicks.

Dr. Ryan Spencer


Degrees & Specialty Certifications

  • Doctor of Physical Therapy -  Quinnipiac University

  • Bachelor of Health Science - Quinnipiac University

  • Board Certified Orthopedic Specialist (OCS) from American Board of Physical Therapy Specialties

  • Certified Strength and Conditioning Specialist (CSCS) from NSCA

  • Certified in Dry Needling via Spinal Manipulation Institute

  • Certified in Blood Flow Restriction Training

  • EXOS Performance Specialist (XPS)

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Dr. Lauren Mueller

Dr. Lauren Mueller is a Phoenix area native and Xavier HS alum specializing in outpatient orthopedics, sports medicine and post-operative rehabilitation. Lauren graduated from Northern Arizona University’s Phoenix Biomedical Campus with her Doctorate in Physical Therapy in 2017 after attending the University of Arizona for her Undergraduate Degree. Since obtaining her Doctorate, she has continued to train 3rd year PT doctoral candidates in their clinical skills as their Clinical Director since 2018. She also holds advanced certifications for dry needling to help her patients get out of pain quickly. 


Lauren has advanced training for treating golfers through the Titleist Performance Institute, TPI.  The Titleist Performance Institute program helps to increase player performance through body function and golfer’s physical limitations during the golf swing. As a former athlete herself, Lauren has experience working with golfers, tennis players, volleyball athletes, weekend warriors, runners, spin and cycling enthusiasts...she's seen it all! She is beyond excited to be part of the Streamline team, where she is able to dedicate one-on-one time with her clients and give each person the individualized attention they deserve.


For fun, Lauren loves to spend her spare time on the golf course or trying out local fitness clubs and classes, including spin cycling (Former Certified Spin Instructor via Madison Improvement Club), HIIT training, pilates and hot yoga. On the weekends you can find her with family and friends, on the golf course or out trying the newest restaurants in the valley!

Degrees & Specialty Certifications

  • Doctorate of Physical Therapy - Northern Arizona University

  • Bachelors of Science in Psychology - The University of Arizona

  • Titleist Performance Institute Medical Provider Certification

  • Certified in Selective Functional Movement Assessment (SFMA)

  • Certified in Dry Needling for Orthopedic Rehab and Sports Performance

  • Certified in Advanced Dry Needling for Lumbo-Pelvic Health

  • Certified in Blood Flow Restriction Training

  • Certified Clinical Instructor for Doctorate of Physical Therapy Candidates