Swimming Career

European Champion, World Championships Finalist, NCAA DI Medalist, World Rankings #1 (50 freestyle), National Champion, National Record Holder, Member of Dutch National Swim Team (1987-1992), Member of SMU Swim Team (1993-1996)

Learn To Swim & Stroke Development

Taught children as young as age two to swim in the deep unassisted and without floatation devices * Years of experience teaching swimmers of all ages to develop efficient swim strokes with the use of video and proven stroke progressions 

Competitive Swimming

Functioned as head coach of Coppell High School's 6-A swim program from 2016-2021 resulting in a doubling of the program to over 100 swimmers, multiple school records, region champions, college signings, and state qualifiers * Five years of club coaching experience (ASCA certified)

Stroke Technique

As Founder and Director of STREAMLINE Biomechanics, helped over five hundred competitive swimmers improve their swim strokes with above- and underwater, frame-by-frame video analysis and a self-developed stroke-analysis system * Developed and delivered countless presentations on stroke technique, starts, and turns * Coached and directed numerous STREAMLINE Biomechanics swim camps and clinics * Taught endless hours of private lessons to swimmers of all ages, levels and abilities * Collaborated with world-class experts, including a National Team Biomechanic, Olympic Coaches, and Olympic Medalists

Other Expertise

Coach Mastebroek has ten years of experience teaching business and leadership classes to high school students in the Coppell ISD. She is also a NASM-Certified Personal Trainer and became a certified Wim Hof Method instructor in 2023. She will add the NASM Nutrional Coach certification to her resume later this year.