About Us
Welcome to Guma i Sindalu Siha — Guam’s home for ninja warrior training, fitness, and community.
We are more than just a gym. We are a place where kids, teens, and adults can challenge themselves, build confidence, and discover their true strength. From beginner-friendly classes to advanced training, open gym sessions, personal coaching, and the Sindalu Ninja Games, we create experiences that inspire growth inside and outside the gym.
Founded by Deren Perez, a six-time American Ninja Warrior, multi-international medalist, and 2023 Coast Guard Elite Athlete of the Year, Guma i Sindalu Siha was built to give Guam’s athletes and families access to world-class training right here at home. Our mission is simple: To empower our members to grow stronger physically and mentally, training with integrity and humility while discovering the ninja within.”
At the heart of what we do is the belief that overcoming obstacles — on the course and in life — builds both physical strength and mental resilience. We teach integrity, honor, and humility alongside athletic development, shaping warriors who are strong in character as well as in body.