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Our signature Level Up Program is more than just a class β itβs a journey. Athletes of all ages train through structured levels, earning skill badges, mastering ninja techniques, and gaining real confidence along the way.
Whether you're a complete beginner or aiming for the national team, our coaches meet you where you are and help you grow stronger, faster, and more focused β one level at a time.
π― Skill-Based Progression
π
Belt-Like Ranking System
π§ Builds Confidence, Discipline & Technique
Ninja Warrior & Fitness Classes β Build agility, strength, and confidence
Open Gym Sessions β Practice at your own pace
Personal Training β One-on-one coaching to reach your goals
Birthday Parties & Events β Celebrate with an unforgettable ninja experience
Merch & Gear β Exclusive ninja apparel and training equipment
The Sindalu Ninja Games are our annual signature event, giving athletes on Guam the chance to test their skills, celebrate their progress, and work toward national and international competition. While the games are an important platform, our true focus is on the daily journey of growth, training, and community inside our gym.
At Guma i Sindalu Siha, we believe every person is capable of greatness β they just need the right environment to discover it.

As Guamβs first and only ninja warrior gym, weβre creating something special β a safe, high-energy space where kids, teens, and adults challenge themselves, overcome fear, and grow stronger inside and out.
From structured ninja classes and open gym sessions to epic events like the Sindalu Ninja Games, our programs are built to inspire, empower, and transform.
Join a community that lifts you up, pushes you forward, and celebrates every victory β big or small.
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Check out the most frequently asked questions about Guma i Sindalu Siha, LLC.
Still haven't found the answer?
Contact UsOur gym is open to athletes ages 6 and up (seperate youth and Adult Classes). For safety and insurance, we do not currently offer classes for younger children.
Not at all!
Our gym is built for all fitness levels. Whether you're new to exercise or an experienced athlete, weβll meet you where you are. Every obstacle can be scaled or modified to suit your ability, and our supportive coaches are here to guide you every step of the way.
Please wear closed-toe, lace-up athletic sneakers with a rubber sole.
π« Not allowed:
Cleats or spiked shoes
Flip flops, zorries, Crocs, or sandals
Indoor soccer shoes, hiking shoes, or boots
All birthday party participants and parents NEED to be wearing clean tennis, running, or athletic shoes. We are a SHOES ON facility. No crocs, slip-on, sandals, heels, or boots will be allowed.
We offer structured ninja classes for athletes ages 6 and up, divided by age and skill level:
Our youth program is split into two training paths:
Youth Novice (Levels 1–3) –Ages 6–11
Focuses on foundational skills, safety, and confidence-building through fun and engaging challenges.
Youth Advanced (Levels 4–6) – Ages 12–15
Introduces more technical skills, obstacle sequencing, and preparation for competitive events.
For beginners to advanced adults (and teens 16+), these classes are built for challenge, progress, and long-term growth.
Each level focuses on strength, endurance, technique, and leadership development — whether you're training recreationally or aiming for competition.
All athletes are placed into the appropriate level after an initial assessment or based on performance in class. Everyone has the opportunity to “level up” through our skills-based progression system.
Absolutely! Celebrate with obstacle-based fun in our gymβcomplete with coach-led activities, team challenges, and equipment use. Contact us to book your date and go over party packages.
Our Level Up Program is a structured training system that helps you progress through skill-based levels — just like earning belts in martial arts!
It includes:
π§ Skill System – Learn core ninja skills and test your progress.
π§ Level Placement – Train in the right class for your current ability.
π Assessments & Promotions – Regular check-ins to celebrate your growth.
π― Motivation & Milestones – Clear goals and fun ways to level up.
It’s the perfect path for athletes who want to build confidence, track progress, and get stronger over time.
This is drop-in time where members can train independently on the obstacles or practice skills. A coach is on-site to assist, but sessions are self-guided.
Wear athletic clothes and lace-up sneakers (closed-toe, non marking shoes required), no crocs, slides, hiking, cleats, steel toe, etc. allowed. Bring lots of water, while we do not have a water refill station, we have bottled water for purchase for your convenience. Outside food can't be consumed on the gym floor.
Please cancel at least 6 hours before your class to avoid penalties. No-shows or late cancels may result in a fee and a loss of a session.
Yes, we run seasonal camps (like summer camp) and workshops focusing on areas like obstacle technique, strength, and your ninja mindset.
You can register for our competitions, including the Sindalu Ninja Games, directly through our website or in person at the gym.
We host quarterly events and national qualifiers, and members receive priority registration and exclusive discounts.
Accidents happen! We ask families and members to be responsible and report any issues. Damage caused by misuse may result in repair fees.
Birthday parties, Camps and special events with food must be scheduled in advance.
Otherwise, no food is allowed. Drinks are allowed, but only in approved areas as we want to keep our obstacles clean and safe for everyone! We ask that all drinks be kept in designated areas.
For safety and hygiene, no food or beverages are allowed in the ninja or weight training zones and to make sure hands are clean before getting back on the obstacles.
Dial in your skills, test new obstacles, or just get in a great workout β this open gym is designed for ages 16+ who want to train at their own pace in a supportive ninja environment.
Details:
π₯ Separate Youth (6-15) and adults (16+)Β
β Access to all designated training zones
β Staff present for safety and supervision
β±Β 2-hourΒ or Unlimited options available
π― Ideal for independent training or skill progression
Note:
No formal coaching provided during Open Gym. Waiver required prior to participation.
Must book in person.
Celebrate like a Ninja!
Make your childβs birthday unforgettable with our action-packed Ninja party experience. This private 2-hour celebration includes obstacle-filled fun, exclusive use of our Ninja Zone, and a fully equipped party room.
π Package Includes β 0:
π Admission for up to 12 kids (ages 6-15 recommended)
π§ββοΈ 80 minutes of exclusive access to our Youth Ninja Zone
π 40 minutes in your private party room to celebrate
π½ Plates, cups, utensils & napkins included
π Free Sindalu Ninja T-shirt for the birthday child
π Free trial class for the birthday child to come back and train
πͺ Tables & chairs provided
π extra time for set/clean up(15 min setup + 15 min cleanup before/after party)
π§βπ€βπ§ Room holds up to 15-20 kids max. Adults may hang out in the party room at no extra charge.
π (Party room dimensions: 20ft x 14ft. Space is limited β seating not guaranteed for all adults.)
| Add-On | Description | Price Recommendation |
|---|---|---|
| Extra Child | Admission for 1 more child (beyond 10) | /child |
| Party Host | 1 staff-led mini βninja challengeβ (30β45 min) | |
| Set-Up & Clean-Up | Let us do the setup and cleanup! | |
| Extended Time | +30 extra minutes (on course) |
Celebrate like a Ninja!
Make your childβs birthday unforgettable with our action-packed Ninja party experience. This private 2-hour celebration includes obstacle-filled fun, exclusive use of our Ninja Zone, and a fully equipped party room.
π Package Includes β 0:
π Admission for up to 12 kids (ages 6-15 recommended)
π§ββοΈ 80 minutes of exclusive access to our Youth Ninja Zone
π 40 minutes in your private party room to celebrate
π½ Plates, cups, utensils & napkins included
π Free Sindalu Ninja T-shirt for the birthday child
π Free trial class for the birthday child to come back and train
πͺ Tables & chairs provided
π extra time for set/clean up(15 min setup + 15 min cleanup before/after party)
π§βπ€βπ§ Room holds up to 15-20 kids max. Adults may hang out in the party room at no extra charge.
π (Party room dimensions: 20ft x 14ft. Space is limited β seating not guaranteed for all adults.)
| Add-On | Description | Price Recommendation |
|---|---|---|
| Extra Child | Admission for 1 more child (beyond 10) | /child |
| Party Host | 1 staff-led mini βninja challengeβ (30β45 min) | |
| Set-Up & Clean-Up | Let us do the setup and cleanup! | |
| Extended Time | +30 extra minutes (on course) |
Introductory-level class designed for beginner ninjas.
This class focuses on developing coordination, balance, strength, and confidence through fun and safe obstacle challenges. Perfect for first-timers or younger athletes learning the basics of Ninja Warrior-style movement. Each week includes skill progressions and age-appropriate drills that promote focus and body control.
πΉ No experience needed
πΉ Capped at 8β10 students per instructor for safety and engagement
Progressive-level class for returning or older youth ninjas.
This class introduces more complex techniques, strength conditioning, and dynamic obstacles. Athletes build on foundational skills while working on grip strength, precision, and strategy. Suitable for students with prior ninja experience or athletic background in gymnastics, parkour, or climbing.
πΉ Coach approval or prior experience recommended
πΉ Focused on skill-building and competition prep
πΉ Capped at 10β12 students per instructor
All-levels class for adults from first-timers to advanced ninjas.
Whether you're just starting your ninja journey or training for competition, this class has something for you. We begin with fundamentals: bodyweight control, grip strength, obstacle basics, and safety techniques. As you progress, you'll take on more complex challenges like laches, warped walls, salmon ladders, and dynamic courses.
Coaches adjust for all levels and provide personal guidance based on ability. Build strength, confidence, and obstacle mastery at your pace β or get ready for the next Ninja competition.
πΉ Beginner-friendly & competition-prep ready
πΉ Modifications and progressions provided at every level
πΉ Great for fitness-focused adults or aspiring Ninja Warriors
Open Gym: Skill Progression
Level up your ninja skills at your own pace! This session is designed for members to practice techniques, refine movements, and progress through our signature βLevel-Upβ program. Whether youβre perfecting a tricky obstacle or building strength and confidence, our safe and supervised open gym environment lets you challenge yourself, track your progress, and improve your ninja skills.
Introductory-level class designed for beginner ninjas.
This class focuses on developing coordination, balance, strength, and confidence through fun and safe obstacle challenges. Perfect for first-timers or younger athletes learning the basics of Ninja Warrior-style movement. Each week includes skill progressions and age-appropriate drills that promote focus and body control.
πΉ No experience needed
πΉ Capped at 8β10 students per instructor for safety and engagement
Progressive-level class for returning or older youth ninjas.
This class introduces more complex techniques, strength conditioning, and dynamic obstacles. Athletes build on foundational skills while working on grip strength, precision, and strategy. Suitable for students with prior ninja experience or athletic background in gymnastics, parkour, or climbing.
πΉ Coach approval or prior experience recommended
πΉ Focused on skill-building and competition prep
πΉ Capped at 10β12 students per instructor
Obstacle Course Race-focused training for Spartan athletes and weekend warriors.
This class blends strength, cardio, and grip-intensive conditioning tailored to the demands of Spartan Races and OCR events. You'll rotate through circuits involving carries, crawls, rope climbs, walls, rig stations, and running intervals β all designed to improve endurance, obstacle technique, and mental grit.
Whether you're training for your first 5K Spartan Sprint or aiming to crush a Beast, this class will push your limits and prepare you for race day.
πΉ All levels welcome β workouts scaled by ability
πΉ Emphasis on real-world OCR obstacle simulation
πΉ Great cross-training for Ninja athletes
Open Gym: Skill Progression
Level up your ninja skills at your own pace! This session is designed for members to practice techniques, refine movements, and progress through our signature βLevel-Upβ program. Whether youβre perfecting a tricky obstacle or building strength and confidence, our safe and supervised open gym environment lets you challenge yourself, track your progress, and improve your ninja skills.
Introductory-level class designed for beginner ninjas.
This class focuses on developing coordination, balance, strength, and confidence through fun and safe obstacle challenges. Perfect for first-timers or younger athletes learning the basics of Ninja Warrior-style movement. Each week includes skill progressions and age-appropriate drills that promote focus and body control.
πΉ No experience needed
πΉ Capped at 8β10 students per instructor for safety and engagement
Progressive-level class for returning or older youth ninjas.
This class introduces more complex techniques, strength conditioning, and dynamic obstacles. Athletes build on foundational skills while working on grip strength, precision, and strategy. Suitable for students with prior ninja experience or athletic background in gymnastics, parkour, or climbing.
πΉ Coach approval or prior experience recommended
πΉ Focused on skill-building and competition prep
πΉ Capped at 10β12 students per instructor
All-levels class for adults from first-timers to advanced ninjas.
Whether you're just starting your ninja journey or training for competition, this class has something for you. We begin with fundamentals: bodyweight control, grip strength, obstacle basics, and safety techniques. As you progress, you'll take on more complex challenges like laches, warped walls, salmon ladders, and dynamic courses.
Coaches adjust for all levels and provide personal guidance based on ability. Build strength, confidence, and obstacle mastery at your pace β or get ready for the next Ninja competition.
πΉ Beginner-friendly & competition-prep ready
πΉ Modifications and progressions provided at every level
πΉ Great for fitness-focused adults or aspiring Ninja Warriors
Open Gym: Skill Progression
Level up your ninja skills at your own pace! This session is designed for members to practice techniques, refine movements, and progress through our signature βLevel-Upβ program. Whether youβre perfecting a tricky obstacle or building strength and confidence, our safe and supervised open gym environment lets you challenge yourself, track your progress, and improve your ninja skills.
Open Gym: Skill Progression
Level up your ninja skills at your own pace! This session is designed for members to practice techniques, refine movements, and progress through our signature βLevel-Upβ program. Whether youβre perfecting a tricky obstacle or building strength and confidence, our safe and supervised open gym environment lets you challenge yourself, track your progress, and improve your ninja skills.
Introductory-level class designed for beginner ninjas.
This class focuses on developing coordination, balance, strength, and confidence through fun and safe obstacle challenges. Perfect for first-timers or younger athletes learning the basics of Ninja Warrior-style movement. Each week includes skill progressions and age-appropriate drills that promote focus and body control.
πΉ No experience needed
πΉ Capped at 8β10 students per instructor for safety and engagement
Progressive-level class for returning or older youth ninjas.
This class introduces more complex techniques, strength conditioning, and dynamic obstacles. Athletes build on foundational skills while working on grip strength, precision, and strategy. Suitable for students with prior ninja experience or athletic background in gymnastics, parkour, or climbing.
πΉ Coach approval or prior experience recommended
πΉ Focused on skill-building and competition prep
πΉ Capped at 10β12 students per instructor
All-levels class for adults from first-timers to advanced ninjas.
Whether you're just starting your ninja journey or training for competition, this class has something for you. We begin with fundamentals: bodyweight control, grip strength, obstacle basics, and safety techniques. As you progress, you'll take on more complex challenges like laches, warped walls, salmon ladders, and dynamic courses.
Coaches adjust for all levels and provide personal guidance based on ability. Build strength, confidence, and obstacle mastery at your pace β or get ready for the next Ninja competition.
πΉ Beginner-friendly & competition-prep ready
πΉ Modifications and progressions provided at every level
πΉ Great for fitness-focused adults or aspiring Ninja Warriors
Open Gym: Skill Progression
Level up your ninja skills at your own pace! This session is designed for members to practice techniques, refine movements, and progress through our signature βLevel-Upβ program. Whether youβre perfecting a tricky obstacle or building strength and confidence, our safe and supervised open gym environment lets you challenge yourself, track your progress, and improve your ninja skills.
Dial in your skills, test new obstacles, or just get in a great workout β this open gym is designed for ages 16+ who want to train at their own pace in a supportive ninja environment.
Details:
π₯ Separate Youth (6-15) and adults (16+)Β
β Access to all designated training zones
β Staff present for safety and supervision
β±Β 2-hourΒ or Unlimited options available
π― Ideal for independent training or skill progression
Note:
No formal coaching provided during Open Gym. Waiver required prior to participation.
Must book in person.
Celebrate like a Ninja!
Make your childβs birthday unforgettable with our action-packed Ninja party experience. This private 2-hour celebration includes obstacle-filled fun, exclusive use of our Ninja Zone, and a fully equipped party room.
π Package Includes β 0:
π Admission for up to 12 kids (ages 6-15 recommended)
π§ββοΈ 80 minutes of exclusive access to our Youth Ninja Zone
π 40 minutes in your private party room to celebrate
π½ Plates, cups, utensils & napkins included
π Free Sindalu Ninja T-shirt for the birthday child
π Free trial class for the birthday child to come back and train
πͺ Tables & chairs provided
π extra time for set/clean up(15 min setup + 15 min cleanup before/after party)
π§βπ€βπ§ Room holds up to 15-20 kids max. Adults may hang out in the party room at no extra charge.
π (Party room dimensions: 20ft x 14ft. Space is limited β seating not guaranteed for all adults.)
| Add-On | Description | Price Recommendation |
|---|---|---|
| Extra Child | Admission for 1 more child (beyond 10) | /child |
| Party Host | 1 staff-led mini βninja challengeβ (30β45 min) | |
| Set-Up & Clean-Up | Let us do the setup and cleanup! | |
| Extended Time | +30 extra minutes (on course) |
Celebrate like a Ninja!
Make your childβs birthday unforgettable with our action-packed Ninja party experience. This private 2-hour celebration includes obstacle-filled fun, exclusive use of our Ninja Zone, and a fully equipped party room.
π Package Includes β 0:
π Admission for up to 12 kids (ages 6-15 recommended)
π§ββοΈ 80 minutes of exclusive access to our Youth Ninja Zone
π 40 minutes in your private party room to celebrate
π½ Plates, cups, utensils & napkins included
π Free Sindalu Ninja T-shirt for the birthday child
π Free trial class for the birthday child to come back and train
πͺ Tables & chairs provided
π extra time for set/clean up(15 min setup + 15 min cleanup before/after party)
π§βπ€βπ§ Room holds up to 15-20 kids max. Adults may hang out in the party room at no extra charge.
π (Party room dimensions: 20ft x 14ft. Space is limited β seating not guaranteed for all adults.)
| Add-On | Description | Price Recommendation |
|---|---|---|
| Extra Child | Admission for 1 more child (beyond 10) | /child |
| Party Host | 1 staff-led mini βninja challengeβ (30β45 min) | |
| Set-Up & Clean-Up | Let us do the setup and cleanup! | |
| Extended Time | +30 extra minutes (on course) |
Celebrate like a Ninja!
Make your childβs birthday unforgettable with our action-packed Ninja party experience. This private 2-hour celebration includes obstacle-filled fun, exclusive use of our Ninja Zone, and a fully equipped party room.
π Package Includes β 0:
π Admission for up to 12 kids (ages 6-15 recommended)
π§ββοΈ 80 minutes of exclusive access to our Youth Ninja Zone
π 40 minutes in your private party room to celebrate
π½ Plates, cups, utensils & napkins included
π Free Sindalu Ninja T-shirt for the birthday child
π Free trial class for the birthday child to come back and train
πͺ Tables & chairs provided
π extra time for set/clean up(15 min setup + 15 min cleanup before/after party)
π§βπ€βπ§ Room holds up to 15-20 kids max. Adults may hang out in the party room at no extra charge.
π (Party room dimensions: 20ft x 14ft. Space is limited β seating not guaranteed for all adults.)
| Add-On | Description | Price Recommendation |
|---|---|---|
| Extra Child | Admission for 1 more child (beyond 10) | /child |
| Party Host | 1 staff-led mini βninja challengeβ (30β45 min) | |
| Set-Up & Clean-Up | Let us do the setup and cleanup! | |
| Extended Time | +30 extra minutes (on course) |