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Onnit Si Board

The ultimate balance training tool.

Onnit Si Board

Onnit Si Board

Onnit Si Board

  • The Ultimate balance training tool
  • Unique Multi-directional design
  • Helps with injury prevention

The Onnit Si Board is the most versatile balance training system available. The Si board is a multi-direction balance training tool that uniquely transfers weight from foot to foot for an absolutely free rotation and the ability to move in all directions. The heart of the balance training system is a solid urethane ball which helps with core control and functional movement that simulate the dynamic training that you need for sport. Engage more muscles as you try to stay upright. In addition to hard core balance training, using the system can help with injury prevention and overall body awareness.

Create 16 unique balance surfaces by combining Balls, Half Balls and Resistance Bands. Progress from basic to advanced skills and add complex training when ready. This is the perfect progressive tool for any user.

The Ball doubles as an unbreakable high rebound medicine ball. Slam the ball on the ground or off the wall for repetitive metabolic training, shoulder stability and reaction skills. The fast and high rebound easily allows you to complete complex full body moves unlike any other ball. These balls are designed to be slammed over and over again. The Si Board Ball is also great for trigger point and myofascial release. The hardness and smaller surface area will penetrate deep compared to a foam roller. For athletes with large and dense muscles these balls work exceptionally well.

The Si Board Ball doubles as an unbreakable medicine ball; get two products in one!

The Onnit Si Board comes with a free mobile app for iTunes and Google Play with instructional videos and pictures of exercises to help you get the most out of the training system.


Getting Started with Foundational Movements:

Being on the ball creates a challenge in all directions. Start your training by mastering the board movement in these combinations.

  1. Left and Right
  2. Forward and Backward
  3. Twisting
  4. Diagonal (combination of Twist and Left and Right)
  5. Clockwise and Counterclockwise
  6. Full 360 Degree Circles moving around the board

Top 10 Board Exercises:

The Si Board is a perfect well rounded training tool for full body coordination and strength. Take the foundational movements and apply them to any stance or position.

  1. Squat with Battle Ropes
  2. Ride Like Surfing, Snowboarding or Wakeboarding
  3. Squat reps with a Kettlebell hold
  4. Push Ups while twisting the board
  5. Dip position hold with one leg in the air
  6. Lunges with Steel Mace movement flow
  7. Yoga Planks and Back Bridges
  8. Kneeling on board with hands on ground for abdominal control
  9. Reverse Push Up with feet on the board and hands on the ground
  10. Bridge with feet on board and trunk on ground for back strength

Top 10 Ball Exercises:

The Si Board Ball is designed for repetitive slamming and high rebounds for complex movement training. For example, easily throw the ball into the air, let it bounce on the ground, squat underneath the rebound, catch and repeat the throw into the air. These exercises are unique to the Si Board ball and should be bounced off of solid concrete surface and walls.

  1. Powerful ground dribble
  2. Squat with chest press overhead thrust
  3. Slam, catch and hold parallel to ground for shoulder stability
  4. Slam to overhead catch for shoulder stability
  5. Chest pass against wall with side agility shuffles
  6. Single arm punch towards wall and catch
  7. Rotational throw against wall with eccentric catch and hold
  8. Squat to one hand shoulder press thrust into air
  9. Agility shuffles with ground slams
Detail photo
Detail shot
Detail photo
Detail shot

Board Specifications

  • 36" x 18" x 1/2" (91.4 x 45.7 x 1.27 cm)
  • 9 layer high-grade Baltic Birch plywood
  • Concave ride surface and elliptical shape
  • All boards have a 1/2" continuous rocker
  • 6 solid urethane blocks secure the rail to the board
  • Grip coat on the entire board surface
  • 28" x 14" x 1” (71 x 35.5 x 2.5 cm)
  • Thick one piece steel rail
  • Durable powder coat
  • Sits 2" off the board base
  • 12 lbs (5.45 kg)
  • Weight limit: 400 lbs (181 kg)

Ball Specifications

  • 6.5" (16.51 cm) diameter
  • 20.41" (51.84 cm) circumference
  • 5.5 lbs (2.5 kg)
  • Large hands can easily grip
  • Great ball for two handed throws
  • Solid urethane without air, gel or sand filling to break open
  • Exceptional resistance to friction, oils, solvents, UV, extreme temperatures and is odor free
  • Higher strength and durability compared to rubber, plastic, or vinyl
  • Made as one complete unit and avoids seams
  • Balls are perfectly round
  • Will not break open or wear with repetitive slamming
  • Slight tacky feel with grip bumps for texture
  • Easily grips the board and ground surfaces for safety
  • Will not slip on carpet or tile floors compared to wood or plastic rollers
Onnit Si Board is rated 4.6 out of 5 by 12.
Rated 5 out of 5 by from For core training If you have a weak core like I do, you will immediately notice that your core gets turned on and all the support muscles in in your legs. Very hard to use this board, you need to practice everyday before you can can stand up on it. Be careful when using this board get away from from anything that can get in the way of your fall. Cause you will fall of this board on your first couple of tries. This board is very expensive. Only purchase if you have the spare bucks.
Date published: 2019-03-13
Rated 5 out of 5 by from Worth it if you have the extra cash Expensive but its a great tool. My balance has never felt better. Its a challenge every time you get on. After about the third month I got pretty decent on it but still improving every time I hop on. Thought of home making one but this is much more superior to anything you could make yourself. Its a good warm up or good to use when youre watching TV
Date published: 2017-10-30
Rated 5 out of 5 by from super fun and challenging Just got my board and it is an absolute blast to train with. Great for balance and core work. Hope you guys offer bigger size boards in the future!
Date published: 2017-05-06
Rated 5 out of 5 by from One Board to rule them All I don’t know what came first, ONNIT then SiBoard or SiBoard then ONNIT. However, giving credit where credit is due, I learned about SiBoard through ONNIT. I would classify myself as a martial artist who previously limited myself to old school bodybuilding style lifting. I never messed with different exercise tools until recently. I had seen and tried other balance boards but thought they were more of a fun gimmick rather than actually useful. I won’t lie, when I saw ONNIT’s promo video for their custom painted SiBoard I instantly ordered it. I figured if nothing else at least I would have this badass board in my gym if I decided to never use it. To my surprise, SiBoard had movement options and training exercise uses I hadn’t experienced with other balance boards. I found that the board rode well and the challenge of riding it encouraged me to not only learn to ride it, but to also incorporate it into my workouts. I also challenged my family to learn to ride so we can see who could stay on longer. I found that riding my SiBoard helped prep me for snowboarding, improve my core and balance which benefited me with my martial arts training, and also helped with ankle mobility which relieved some of my foot issues. My only complainant is that the Si Board is not incorporated into Onnit programs or Onnit On Demand channels.
Date published: 2016-07-25
Rated 5 out of 5 by from love it This thing is great, one of the most fun and challenging balance training tools I've ever used. A bit pricey, but super high quality, and once you stand on it you won't regret the purchase!
Date published: 2016-04-27
Rated 5 out of 5 by from Great Tool! Love this Si Board! This tool has not only helped to prepare me for the upcoming surf season, but has also helped me improve my balance and coordination. It is expensive , but remember quality comes at a price and you get what you pay for. Not to mention it was made here in the USA. The only downside...I wish it came with other sized balls to build progression. One size does not always fit all skill levels.
Date published: 2015-05-20
Rated 5 out of 5 by from Awesome my Jiu Jitsu passing game is getting sick with this board
Date published: 2015-04-29
Rated 5 out of 5 by from Great weapon for your workout arsenal.. I have used it everyday for about a week now. I'm slowly getting better and better. You can really feel it working the stabilizer muscles in the feet and legs. However, I wish Onnit would offer all of the additional balls and board styles. the half balls would really help for the beginners.
Date published: 2015-04-17
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