Cori Lefkowith

Founder of Redefining Strength and Creator of The STRONG System

Cori Lefkowith is the founder of Redefining Strength and creator of The STRONG System, the evidence-based approach to training, nutrition, and mindset behind her Amazon bestseller The STRONG System: Transform Your Mindset and Build Your Best Body at Any Age. She’s known for challenging outdated beliefs about aging and intensity, and for teaching women to train smarter so they can stay strong, capable, and confident for life. Cori hosts the Redefining Strength podcast, and under her leadership, RS has helped over 10,000 women, made the Inc. 5000 twice, and earned more than 100 million YouTube views. Her work has appeared in SELF, Women’s Health, Prevention, Eat This, Not That!, MindBodyGreen, Well+Good, Livestrong, and Fit&Well.

Jessica H. Maurer

Fitness Educator & Consultant

Jessica H. Maurer is a wellness consultant, strategist, and keynote speaker helping professionals overcome burnout and improve mental wellness. She empowers individuals and organizations through international presentations, workshops, and consultations, promoting clarity, resilience, and success.

With over 20 years of experience, Jessica has delivered workshops, keynotes, and consulting across industries and on international stages. She has authored widely published content and influences how fitness and wellness professionals approach physical and mental well-being. A 2025 IDEA Fitness Leader of the Year finalist, she is now Director of Education at the Mental Wellbeing Association, developing programs that combine science-based strategies with a holistic approach to wellness.

Arlen Guerrero, MS

Director of Education – Equinox Fitness Trainer Institute (EFTI)

Arlen Guerrero, MS, is a seasoned leader with 20+ years of experience in the health and fitness industry, focused on business growth and operational excellence. He specializes in sales strategy, team leadership, and optimizing the customer experience. Arlen has managed large-scale operations generating over $50 million in annual revenue across 21 clubs in 7 markets. His strategic mindset drives innovative sales initiatives that consistently exceed key performance metrics, including personal training revenue and trainer retention, achieving a penetration rate of over 9%.

Desi Bartlett, EdD

Women’s Health Expert & Internationally Published Author

Desi Bartlett EdD, CPT E-RYT, has over 30 years of teaching health and wellness. She is a motivated international presenter and spokesperson. Her teaching style taps into inner joy, making movement an outer expression. Originally from Chicago, she earned a degree in Kinesiology, a dance minor, a Master’s in Corporate Fitness, and a doctorate from Concordia University, St. Paul. She holds certifications in Yoga, Personal Training, Pre & Post Natal Fitness, and Group Fitness, and provides continuing education through Yoga Alliance, NASM, and NCCPT. Desi has worked with companies like Manduka, Gaiam, Equinox, Yogaworks, the US Navy, Mattel, and Frenshe.

Tyler Valencia, PhD(c)

CEO & Founder of KIPS 

Tyler Valencia, PhD(c), is the CEO & Founder of KIPS. While working for the National Exercise & Sports Trainers Association (NESTA), an online fitness education company, he started his first business, Time 2 Train Fitness, which specialized in boot camp and personal training. Time 2 Train Fitness went on to receive the distinction of 3X Best Bootcamp and 2X Best Personal Trainer with the Long Beach Press-Telegram. Before founding KIPS, Tyler served as Vice President of the National Council for Certified Personal Trainers (NCCPT), as Vice President of Smart Fitness, and as Program Development at Fitness Mentors.