Team & Affiliates


Kyle McKelvey, CSCS

Assistant Director  –  Performance Coach
Elevation Nation Performance Instructor

Kyle has been with Coach Rozy Performance since 2016.    He holds his M.A. in Kinesiology and Sport Science from the University os South Dakota (USD) and is a Certified Strength and Conditioning Specialist (CSCS),  also XPS Certified (Certified EXOS Performance Specialist).  He did his internship at EXOS in Texas where he worked with  30+ NFL Off-Season athletes and 8 NBA Off-Season athletes.

Coach McKelvey was Graduate Teaching Assistant of Kinesiology Department at USD while working on his Masters degree.  He also was on the USD Track and Field Athlete where he was Team Captain, Pan American Shot Put Silver Medalist (Team USA), USATF Junior National Champion, 4-time NCAA National Championship Regional Qualifier, and a State, School, and Summit League Conference Record Holder.  He also served as Volunteer Assistant for USD Spring Football Strength and Conditioning in 2015.

 Ronette Karstens

Performance Coach
Elevation Nation Performance Instructor
Personal Assistant to Coach Rozy * Teach/Coach at Gayville-Volin School

Ronette has been with the Coach Rozy Team since 2015. She graduated from the University of South Dakota with her Bachelors Degree in Education.  She is currently a First Grade Teacher at the Gayville-Volin School District where she also coaches Girls Basketball.

Ronette truly “did it all” while at Gayville-Volin High School; participating in Oral Interpretation, Flags, Cheerleading, Band, Choir, the School Newspaper, Yearbook, Softball and Student Council.  She was named Salutatorian her senior year.  As an athlete she was aware the Radier Award and Academic All-State.

Ronette was a star basketball and track athlete starting on the varsity team as an eighth grader.  She was awarded most improved that year by her coach.  She earned team MVP every year after that as a freshman, sophomore, junior and senior.  her senior season she averages 13.4 points, 10 rebounds, five steals and 5 assists per game.  She was named 2ned Team All TVC for two years and 1st Team All-TVC for one year.   Her track career was as equally impressive as her basketball career.  She ran high school track from 7th grade to 12th grade.  She was named most improved in her 8th grade year and MCP her freshman, sophomore, junior and senior year.  She still holds schools records in the high jump and triple jump.  With her past experience, knowledge and drive, she loves to work hard, focus and bring high energy to at all she does – helps her excel with the Coach Rozy Team.

Ronette has a husband, Justin who also coaches and is a part time assistant with the Coach Rozy Team. She has 3 boys, Caid, Spencer and Preston, whom she loves to spend time with and is involved with their athletic and school programs.

Justin Karstens

Performance Coach 

Teach’s at Gayville-Volin School * Head Boys Basketball Coach (GVHS) *  Assist FB Coach/Def. Coordinator (GVHS)

Coach Karstens, married to Coach Rozy Performance Coach Ronette Karstens, has been with the performance program since 2017.  Teaching and Coaching boys and girls his whole career, Justin brings a wealth of knowledge and sports skill to the Coach Rozy Program.

Justing has been at Gayville-Volin for the past 13 years, where he as been Heads Boys Basketball Coach for the past 7 years (he was previously Girls Head Coach at GV before that) and has been an Assistant Football Coach for the last 7 years.

As mentioned, Justin’s wife Ronette also coaches and is an assistant with the Coach Rozy Team. They have 3 boys, Caid, who is starting his baseball career at Mt. Marty College, Spencer and Preston, who are heavily involved with their athletic and school programs.

Trevor Woods, MA, ATC

Summer Performance Coach
Licensed Athletic Trainer with NATA & SD State Board of Medical Examiners Instructor
Athletic Trainer for Yankton HS & Gayville-Volin HS

Trevor, MA, ATC has a bachelors degree in Athletic Training from South Dakota State University (SDSU) and a Masters Degree in Exercise Science from University of South Dakota (USD). He has been providing Athletic Training coverage to Yankton High School and Gayville-Volin High School for 17 years. He has been doing sports enhancement programs since 2002 working with numerous individual and team State Championship athletes.

He loves working with athletes to improve performance while helping reduce the risk of injuries for the athletes.

Cade Rickford

Performance Coach

Caid has been with Coach Rozy Performance since 2017 as an Assistant Performance Coach.  Prior to that, Cade was a Coach Rozy Performance Athlete all through his High School career where he as a stand out in Football, Basketball and Track & Field.  Caid finished up basic training for United States National Guards this past fall & winter, and jumped right back into taking over coaching duties and working with teams in the area.  He is attending University of South Dakota in the fall of 2019 to pursue his degree to become a Strength and Conditioning Coach, and help again this summer with Coach Rozy Performance.

Austin Miller

Performance Coach

Joe Mazour

Performance Coach

Carlos Sanchez

Performance Coach

Sarah Rockne, ATC

Athletic Trainer/ Summer Performance Coach

Miles Rademaker

Performance Coach


911 Tactical Performance

Live Pain Free – THE RIGHT MOVES

Jeffrey Paul Salon


Performance Sandbag Training

Performance Sandbag Training