About Us


Catalyst Sports Medicine began on January 1st of 2013 when then General Manager John Knutson and Clinic Director J.W. Matheson purchased the business entity from Rich Larsen, who previously owned Larsen Sports Medicine & Physical Therapy. The 7,200-square-foot clinic, located at 2305 Willis Miller Drive in Hudson’s Industrial Park, was quickly becoming too small and congested as services were added and the business grew. Knutson and Matheson always had a goal of transforming the physical therapy clinic into a sports medicine practice. While specializing in physical therapy, athletic training, industrial medicine, orthopaedic massage services and performance training for athletes were added. As all areas of the practice were growing, the need for more space was imminent. Matheson and Knutson purchased the old “Skatery” building on the corner of Hanley & O’Keefe Roads in January of 2015 and began an extensive renovation for the sports medicine practice. On September 1st of 2015, Catalyst opened the doors to the newly renovated 22,000-square-foot facility located on 2.5 acres of land. It included an expanded PT clinic and performance training center and also a new 10,300-square-foot indoor turf training center which sets Catalyst apart from all other therapy clinics and gyms in the region. Today, Catalyst employs 20 people including physical therapists, PTAs, athletic trainers, massage therapists, strength coaches and administrative and customer service personnel.

Mission & Vision

To always exceed the expectations of our clients.
To be considered the premier provider of services by our clients and industry peers in the areas of Physical Therapy, Athletic Training, Strength and Conditioning, Industrial Medicine and Wellness Programs.



John Knutson: Owner & CEO

John Knutson received an associate degree in commercial art from Western Wisconsin Technical Institute in 1979. John worked as a graphic designer for two years at Mound Graphic in Elk Mound, WI before buying that business and operating Star Graphics from 1981-1984. After selling Star Graphics, John became the Art Director, Production Manager and Plant Manager of All American Manufacturing of Menomonie, then Boyceville, WI from 1984-1988. In the fall of 1988, John partnered with Eric Strand to start the graphic design and printing firm RPG in Hudson. He managed RPG until 2008 when RPG merged with Digital Dynamics of River Falls and The Resco Company of Hudson. John served as President of RESCO from January of 2008 to August of 2011 when he sold his interest to his business partner. John then started working in the area of business development at LSMPT, a Hudson physical therapy clinic in October, 2011 and was named General Manager in January of 2012. In January of 2013 John and J.W. Matheson purchased the company, and changed the name to Catalyst Sports Medicine. As co-owner and CEO at Catalyst, John oversees and directs business management and operations including strategic planning, finance, HR, marketing and business development. In addition to running the Catalyst Sports Medicine business operations, John is involved in numerous community and civic organizations including the Hudson Area Chamber of Commerce, Hudson Daybreak Rotary, Junior Achievement, United Way, Knights of Columbus, Hudson Community Fund, Big Brothers Big Sisters, Hudson Booster Club and more. John was one of the founders of the Hudson Hot Air Affair, which is still running strong since its inception in 1990. John was one of five individuals who started the Junior Achievement program in Hudson in 1992. John also started the Chamber Manufacturer’s Council in 1992, which is now called the Chamber Manufacturer’s Roundtable. John also coaches the Hudson High School Girl’s (Fall) and Boy’s (Spring) Tennis team. His involvement with local groups and organizations keeps Catalyst Sports Medicine connected to what really matters to people in the Hudson community.

J.W. Matheson, PT, DPT, MS, OCS, SCS, CSCS: Owner & Clinic Director

J.W. Matheson is a 1996 graduate of the Mayo Clinic of Health Sciences and a 2001 graduate of the first public APTA credentialed Sports Physical Therapy residency at Gundersen-Lutheran Sports Medicine in Onalaska, WI. He is both a board certified specialist in sports physical therapy and a board certified specialist in orthopaedic physical therapy. J.W. completed his transitional DPT degree from the Massachusetts General Hospital Institute of Health Professions in 2005. He has also maintained his certification as a strength and conditioning specialist since 2000. Dr. Matheson is a respected author and clinical researcher and has authored and co-authored several peer-reviewed research articles on specific exercises for the spine, knee, and shoulder. J.W. integrates clinical outcomes and functional measurements into his daily clinical practice and is currently working with several partners on different models of reimbursement based on rehabilitation outcomes. He has presented at national conferences on the integration of patient reported and functional outcomes into clinical practice. Dr. Matheson is co-owner and clinic director of Catalyst Sports Medicine. He is an active member of the American Physical Therapy Association (APTA) and serves on several legislative and research committees locally and nationally. J.W. is a strong advocate for science-based medicine and cost-effective solutions to treating common musculoskeletal conditions. He is committed and passionate about doing all he can to help individuals of all ages return to the sports and recreational activities they love.

Physical Therapy

J.W. Matheson, PT, DPT, MS, OCS, SCS, CSCS: Owner & Clinic Director

See Ownership

Scott Peterson, PT, DPT, OCS, CSCS

Scott Peterson received his Doctorate of Physical Therapy (DPT) from the University of Wisconsin-Madison in 2010. Prior to his DPT, he earned a B.S. in exercise science: movement science from Winona State University in Winona, MN in 2007. He has been a certified strength and conditioning specialist through the National Strength and Conditioning Association since 2007. Scott is a member of the American Physical Therapy Association and the sports section of the APTA. He enjoys participating in continued education to improve his knowledge and skills as a practitioner to better treat his patients. Scott has been an active athlete throughout his life and played collegiate football while at Winona State. He has a strong interest in sports medicine and the general orthopaedics field of PT. He enjoys spending time with his family and being active indoors and outdoors. Scott uses a variety of treatment techniques, focusing on individualized exercises to obtain optimal results. As a physical therapist, Scott enjoys helping people get back to the things they love to do.

Heidi Schulz, PT, OCS, SCS, LAT

Heidi Schulz received her degrees in athletic training and physical therapy from the University of Wisconsin-Madison. Her high achievements were honored with the Outstanding Student Athletic Trainer Award and a physical therapy student scholarship two years in a row at the University of Wisconsin-Madison. She joined Catalyst Sports Medicine in January, 2007 as a physical therapist and as one of the athletic trainers at Hudson High School. Heidi’s board certification as a specialist in orthopaedic and sports physical therapy pertains to treating a wide variety of conditions, including those involving the spine, hip, knee, ankle, shoulder, and elbow. She specializes in sports medicine and return-to-sports rehabilitation. Heidi has extensive experience in covering athletic events for youth, high school, and Division I college levels. Heidi is a Hudson High School graduate, and she currently resides with her husband and two sons in Hudson, WI. Her love for assisting athletes and patients of all kinds maintain physical health drives her to provide the best quality care.

Robyn Wells-Mangold, PT, DPT

Robyn Wells-Mangold graduated from Northwestern University in Chicago, IL with a Doctorate in Physical Therapy in December 2008. She spent her undergraduate time at the University of Iowa receiving a Bachelors degree in exercise science with a minor in psychology. Robyn has worked as a physical therapist in a variety of settings including transitional, acute, skilled nursing, and outpatient care. She has a passion for treatment of orthopedic injuries and women’s health issues. Her goal is to help people of all ages participate in a healthy and active lifestyle.

Carissa Beeksma, PT DPT

Carissa Beeksma received her Doctorate of Physical Therapy (DPT) from Rosalind Franklin University of Medicine and Science in 2018. Prior to her DPT, she earned a B.S. in Biomedical Science from UW-River Falls in 2015. Carissa is a member of the American Physical Therapy Association, and the sports section of the APTA. Carissa has been an active athlete throughout her life with gymnastics and equestrian sports. She participated on the collegiate equestrian team for four years while at UW-River Falls. She has a strong interest in both sports medicine and treating pediatric patients. She enjoys spending time with family and friends, riding her horse and being outdoors with her two dogs. Her goal is to provide an individualized treatment plan to each patient, helping them get back to the activities and sports they love and assist them in leading a healthy, active lifestyle overall.

Athletic Training

Megan Rinke, M.S. ATC, LAT: Head Athletic Trainer

Megan Rinke graduated from University of Wisconsin- River Falls (UWRF) in the fall of 2012, earning her bachelor’s degree in health and human performance with an emphasis in exercise and sport science and a minor in coaching. While at UWRF, she was a track and field athlete for four years, as well as a work study aide for two years for fall athletes. She later earned her master’s degree in athletic training from The College of Saint Scholastica in spring of 2015. During her time in Duluth she worked with local high school and college teams with a variety of sports the Duluth area, and did her internship at Ralph Lundy Academy summer soccer camps in Arden Hills, NC. After graduate school she began working at the University of Minnesota Crookston. For three years she worked with women’s volleyball, equestrian and men’s baseball teams. She provided strength and conditioning for volleyball and baseball teams and worked on preventative management of shoulder injuries. Megan began working at Catalyst Sports Medicine in the summer of 2018. She is now the head athletic trainer for Catalyst and contracts to Hudson High School’s athletics department. Megan enjoys outdoor activities, hobby farming, and Her passion for physical activity and sports medicine makes her an integral member of the Catalyst team.

Heidi Schulz, PT, OCS, SCS, LAT

See Physical Therapy

Strength & Conditioning

Chase Madison, MS, CSCS, Director of Strength and Conditioning

Chase Madison is the Director of Strength and Conditioning at Catalyst Sports Medicine. Prior to Catalyst, Chase served as an assistant strength and conditioning coach at D1 Sports Training in Waukee, IA. Before his time at D1, he volunteered as a strength coach for the University of Alabama and University of Iowa. While there, he worked directly with baseball and track and field, among observing numerous other sports. During his time as a strength coach, he has competed at the professional level in the sport of track and field. He was ranked #2 in the US and #19 in the world in the discus in 2015. His career highlights include winning the SEC Championship in the discus at the University of Kentucky, earning All-American status three times, competing at the 2008, 2012, and 2016 Olympic Trials, and being an alternate for the World Championship team in 2015. Prior to his time as a certified strength coach, Chase worked as a graduate assistant in strength and conditioning for Illinois State University while earning his Master’s degree in sport psychology. While there, he worked directly with football, gymnastics, track and field, men’s and women’s basketball, and volleyball. One of his most notable athletes, Tim Glover, improved from being a walk-on javelin thrower to a two-time National Champion under Chase’s tutelage in the weight room.
  • National Strength and Conditioning Association – Certified Strength and Conditioning Specialist
  • USATF Level 1 Sport Coach
  • Master’s degree – Sport Psychology (Illinois State University)
  • Bachelor’s degree – Kinesiology (University of Kentucky)
  • Three-time Olympic Trials competitor
  • Three-time All American (discus, shot put)
  • Southeastern Conference Champion (discus)
  • #1 ranked thrower in Iowa high school history in combined throwing events (discus – 206’9, shot put – 66′.5)

Rance Ashley, CSCS, Assistant Strength and Conditioning Coach

Rance Ashley is an assistant strength and conditioning coach for Catalyst Sports Medicine. Prior to working at Catalyst, he worked as an intern strength and conditioning coach for two semesters at the University of Wisconsin-River Falls. While at UWRF, Rance played football for the Falcons and was a three-time WIAC All-Conference player. In 2017, he earned a National Strength and Conditioning Association All-American Athlete of the Year Award in football. Rance graduated from the University of Wisconsin-River Falls in December 2017 with a Bachelor’s degree in Exercise and Sport Science. Rance is a Certified Strength and Conditioning Specialist (CSCS) through the National Strength and Conditioning Association.

Hannah Havemeier, Assistant Strength and Conditioning Coach

Hannah Havemeier is an Assistant Strength and Conditioning coach for Catalyst Sports Medicine. Prior to working at Catalyst, she was an Athletic Performance Intern at the University of Minnesota. While with the Minnesota Gophers, she worked directly with rowing, softball, wrestling, volleyball, soccer, baseball, track & field, and tennis. Prior to her D1 experience, Hannah was a strength and conditioning intern at UW-River Falls for three semesters. While at UW-River Falls, Hannah played volleyball for the Falcons. In 2016, she received the National Strength and Conditioning All-American Award for her speed and strength performances. Hannah graduated from UW-River Falls in December 2018 with a bachelor’s degree in Health and Human Performance.

Industrial Medicine

JW Matheson, PT, DPT, MS, OCS, SCS, CSCS: Owner & Clinic Director

See Ownership


Kasha Jacks: Office Manager, Insurance Specialist

Kasha Jacks graduated from the University of Wisconsin-River Falls with a bachelor’s degree in business administration – management in 2009. She also earned an associate’s degree from the medical administrative specialist program at WITC-New Richmond in 2010. Kasha joined Catalyst Sports Medicine in the fall of 2011 and works as the lead patient care coordinator and insurance specialist. Kasha resides in Hammond, WI with her husband, Jason and son, Tyler and enjoys cooking, gardening, and spending time with family. She is committed to providing clients with a professional level of knowledge and exceptional level of care.

Jess Williams: Medical Billing Lead

Jess works at Catalyst Sports Medicine as the medical billing lead. She has been employed at Catalyst Sports Medicine since March, 2014. Jess received her associate’s degree in the medical administrative specialist program from Wisconsin Indianhead Technical College in New Richmond, WI in May, 2014. She specializes in insurance claims/denials, credentialing providers, and insurance contracting. Jess resides in Amery, WI with her husband, Eon and enjoys camping, reading, and spending time with her family. Her credentials along with her caring attitude help patients receive the best care.

Career Opportunities

Physical Therapists, PTA’s, Athletic Trainers and Industrial Medicine specialists, Strength & Conditioning specialists and Orthopedic Massage Therapists…please feel free to submit a letter of interest, along with your resume for future employment consideration.

Internship Opportunities

For all Internships, please send a letter of interest, along with your specific commitment or requirements to fulfill your internship obligation to the following personal at Catalyst Sports Medicine for your consideration:

Physical Therapists and PTA’s…contact Scott Peters, DPT at speterson@catalystsportsmedicine.com

Athletic Training & Industrial Medicine Specialists…contact Megan Rinke, M.S. ATC, LAT at mrinke@catalystsportsmedicine.com

Strength & Conditioning and Performance Training…contact Chase Madison, Director of Strength & Conditioning at cmadison@catalystsportsmedicine.com

Orthopedic Massage Therapists…contact Janelle Debold at jdebold@catalystsportsmedicine.com

Or feel free to call any of the supervisors at Catalyst Sports Medicine. The clinic number is 715-386-1155