Let's have a warm welcome to USA Ninja Challenge - a place where kids can be kids in a fun and safe environment.
At USA Ninja Challenge, we believe in nurturing healthy children, not just physically, but also mentally. Our program is designed with a unique blend of activities from gymnastics, climbing, cross-training, and track & field, ensuring a comprehensive development in your child.
The long-term benefits of our program extend far beyond physical fitness. As children engage with our world-class, creatively designed equipment, they not only build strength and agility but also develop mental toughness and resilience. This combination of physical and mental fortitude prepares them for the challenges of life, equipping them with the confidence and self-esteem to face any obstacle head-on.
Our classes, open to boys and girls ages 2.5 to 17, are structured into six levels. Each level offers a variety of progressions, drills, and challenges, tailored to nurture each child's unique abilities. This approach ensures that every child progresses at their own pace, celebrating each milestone with a sense of accomplishment.
Ninja Fitness Classes offer an immersive experience into the sport of Ninja, introducing children to a diverse range of obstacles in an interactive learning environment. This isn't just about fitness; it's about instilling life skills in a fun and engaging way. Your child will not only have a blast but also learn valuable lessons that extend beyond the gym.
At USA Ninja Challenge, we're committed to providing a supportive and stimulating environment where your child can thrive. Our world-class quality equipment is designed to keep kids engaged, promoting a lifelong love for fitness and personal growth. Join us, and watch your child develop into a strong, confident individual, ready to take on the world's challenges.
Come meet the owner Arnaldo Brasil
Arnaldo is a former swimmer who put in hard work in the pool, always chasing excellence. Originally from Brazil, he’s built an adventurous life alongside his wife, a skilled softball player. Together, they’ve tackled skydiving and summited Half Dome in Yosemite—epic feats they’ve shared as a duo.
A dedicated dad to four daughters, Arnaldo has teamed up with them for Spartan races and OCR challenges, bonding over grit and fun. His own path—from years of competitive swimming to chasing Olympic dreams—taught him that character outlasts trophies. That insight fuels his mission today.
One of the biggest lessons Arnaldo learned as an athlete is the difference between a transactional coach and a transformational coach. He believes true coaching goes beyond skills—it’s about building confidence, resilience, and a mindset for life. That’s why he’s pumped to bring USA Ninja Challenge to San Jose. This vibrant community is the perfect place to create an environment where kids conquer obstacles, build character, and have a blast.
“This isn’t just about ninja skills—it’s about empowering kids to take on challenges in the gym and in life,” Arnaldo says. “I want to equip kids to live a life of excellence one obstacle at a time.”
And if you don’t see him coaching? He’s probably testing out the ninja obstacles himself—or getting beaten by his daughters in a race!