We are...
Active athletes into power lifting & HYROX, with pilates in there too.
Busy professionals juggling lives, parenting, ongoing education, and tattoos!
A veteran and collegiate baseball player who worked through sports injuries.
At our core have a strong passion for mobility, training, and our clients!
DUSTIN SAN MIGUEL, founder and lead practitioner, combines decades of competitive athletics, advanced therapeutic training, and a lifelong commitment to helping others move, perform, and live at their best.
Dustin is a 28-year competitive powerlifter, a pursuit that forged his discipline, resilience, and deep understanding of human performance. He began his personal trainer journey in 2009, later expanding his expertise through extensive education and advanced certifications. In 2010, Dustin joined the U.S. Army as an Infantryman. Demonstrating both courage and commitment, he volunteered for deployment as an Infantry K9 Handler and later served as a contractor for the Department of State at the U.S. Embassy in Kabul. These experiences instilled a mindset of adaptability, precision, and leadership that now define his approach to coaching and rehabilitation.
Academically, Dustin studied Sports Management and Exercise Science at California University of Pennsylvania, building a strong scientific foundation to complement his hands-on experience. He has since earned an impressive roster of credentials, including:
-
Fascial Stretch Therapy (FST) Practitioner Level 2—advancing to the Level 4 pinnacle in 2026
-
PPSC—Pain-Free Performance Specialist, Pain-Free Knees, Lifelong Performance Specialist Certification, Programming, and Training Methods
-
ISSA—Certified Personal Trainer and Specialist in Fitness Nutrition
-
NASM—Stretching and Flexibility Coach
-
Precision Nutrition—Master Nutrition Coach
-
Westside Barbell Strength Coach
Southlake Mobility & Rehab is a culmination of Dustin’s decades-long mission to bridge strength training, rehabilitation, and pain-free movement. With his rare combination of athletic grit, military discipline, therapeutic mastery, and a passion for empowering others, Dustin is redefining what it means to train, recover, and thrive.
Raised in Texas, Dustin is deeply grounded by family. He’s married to the love of his life and is a proud father to a teen daughter who is following in his footsteps as a powerlifter.
KEIGAN LANDCASTER has a mission to help clients unlock their full potential both physically and mentally. With 11+ years of experience, Keigan has honed his expertise in mobility & stretch, sports performance, strength building, fat loss, and hybrid training. Keigan holds certifications from ACSM and AFSA, studied Kinesiology at the University of North Texas and Tarleton State University, and brings a deep understanding of the body’s mechanics and how to train/recover effectively and safely.
Well-known throughout the DFW area, he’s worked at wellness facilities and gyms including StretchLab (manager, lead flexologist), Life Time Westlake, The Marq Champions Club, Revival Fitness, and Orangetheory.
Having grown up immersed in sports, including playing college baseball, Keigan understands first-hand the importance of mobility. He was introduced to stretch after suffering through sports injuries and subsequent surgeries, and hasn’t looked back. He now helps clients prevent injuries, improve mobility, and enhance flexibility at Southlake Mobility & Rehab. He believes in having fun (leopard Fridays!) while building tailored programs and thrives on clients improving physically, but also experiencing a mind shift that positively impacts every aspect of their daily lives.
In addition to mobility & stretch sessions, Keigan provides one-on-one personal training at Southlake gyms CABRA Hybrid Fitness, Impact Performance, or in-office on Tonal.
Keigan’s currently training for HYROX races. He’s using his mobility prowess to keep himself injury-free and is committed to guiding you on your journey.
Motto: 1% Better Every Day!
Instagram: @keigs_44