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Flex VBT Sensor by GymAware

  • Guaranteed 2 Business Day Fulfillment 


Did you know Kabuki Strength is an industry-leading provider of Virtual Coaching services utilizing VBT as a primary autoregulation variable for strength athletes? Click here to learn more and to schedule a FREE strategy call with one of our coaches.


Introducing FLEX: the industry's first truly accurate optical Velocity Based Training sensor designed + engineered by GymAware. 

Using a cutting edge optical sensor designed in-house, FLEX measures lift performance with laser accuracy and gives powerful real-time feedback through your smartphone.


FLEX allows individual athletes to train better, avoid injury and track their progress with accuracy. Using the same technologies and training methods as elite athletes, you can access real time metrics including Power, Velocity, Distance and Bar Path on each and every lift.


With the rise in popularity of Velocity Based Training, individual athletes are able to take advantage of the FLEX as a way to pre-determine their training load. Velocity Based Training uses velocity as a biometric feedback tool to gauge weight training on a day to day basis. Basically, velocity output helps dictate how much load you should be adding or removing on a particular set, or if you should move on and try a new exercise altogether.


There has never been an easier way to accurately measure your performance in the weights room. Whether you’re interested in validated metrics, keen to challenge your mates, or simply want to improve, FLEX is the perfect addition to your kit bag. Take the guesswork out of your sessions and train with FLEX; with Lift Intelligence.



  • FLEX Sensor
  • Reflective Mat
  • Micro USB Charging Cable
  • Free App Download (Optimized for iOS)
  • 12 Month Warranty 


Data Metrics:

VELOCITY: Maintain intensity and choose the optimum weight for every lift.

POWER: Immediate feedback on the performance of every lift and monitor results.

DISTANCE: Maintain range as you fatigue and improve overall technique.

BAR PATH: (horizontal): Identify opportunities to refine technique.

BAR POSITION: (vertical): Spot sticking points and improve efficiency.


WIRELESS: Rapid bluetooth 5.0 connectivity and over 10 yard range.

PRECISE: Our laser optic array is ultra precise for trusted data.

PORTABLE: Lightweight and compact, FLEX fits in even the most overcrowded gym bag.

Real-time feedback for every lift, as you lift.

Measures an extensive list of barbell exercises including all major lifts – Bench Press, Deadlift, Squat, Cleans and Snatch.

FLEX automatically recognises when sets start and finish.

Use the 1RM protocol to safely estimate 1RM at sub maximal load.

Compare lifts, share results and compete with friends in the FLEX Community.

Create Workouts to automate sessions and minimise contact with your wireless device.

Reports on every session, with weekly and monthly progress updates.

Review every lift FLEX has ever measured in the History section.



About GymAware

For 15 years we have provided the sports industry with the world’s leading performance measurement device, GymAware. Our passion for performance and a commitment to continued improvement for all athletes led us to develop the definitive individuals’ solution, FLEX.

FLEX gives individuals the power of accurate performance data previously restricted to the elite. By integrating cutting edge laser optic technology, FLEX ticks all the boxes – portable, accurate and affordable.

Like GymAware, FLEX measures barbell velocity, power, distance, bar path and bar movement. Every rep is measured and every set is tracked. Real-time lift performance displayed through the FLEXStronger app holds you accountable to session intensity and training zones.

FLEX encourages a more social training experience. Compare results, share with friends and follow the performance of your sporting heroes.

At its core, FLEX is all about assisting you to make informed training decisions, in real time and with superior accuracy. Change the way you train, forever.

Customer Reviews

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Ask a Question
  • How can I utilize VBT and other data from the FLEX unit during my training?

    Kabuki Strength offers virtual coaching services that utilize VBT and associated data to autoregulate training for strength athletes. If you'd like to learn more or sign up for a free strategy call with a coach, click here

    The following two articles are great resources and overviews of VBT:

    - The Autoregulation Book of Methods
    - A Powerlifter's Guide to Velocity Based Training Part 1

  • What comes included with the FLEX product?

    Each FLEX unit comes in a box with the following items:

    - FLEX Sensor
    - Reflective Mat
    - Micro USB Charging Cable
    - Free App Download (Optimized for iOS)
    - 12 Month Warranty

  • Where can I find a FAQ or Help Guide for the FLEX unit?

    GymAware has published an extensive resource library here where you can learn more about use of the FLEX sensor and app!

  • Does the Flex VBT sensor and app allow for data download/upload into a excel or google sheet document?

    Not at this time.  However, the concept is being considered for the future.

  • Between FLEX and VITRUVE VBT ENCODER, which one do you suggest for Olympic weightlifting? And why?

    We would 100% suggest the Flex VBT sensor by GymAware, because it is not tethered.  It is much better to Oly lift without the string!

  • Will it expand to android users?

    We have been told they are working on an Android app, but do not know when it will be ready for market.

  • Do you guys have any information on the reflective mat. I can see that it comes in the pack, but can't see any actual information on that particular product?

    The mat can be rolled or folded and is made of neoprene, similar to the thickness of a light Yoga mat.

    • The reflective mat weighs 400 grams (14 ounces or 0.89 pounds)
    • When un-rolled it is 120cm long and 32cm wide (4f x 1f)
    Here is a link to GymAware's site for information on the mat;

  • Hi there, What would the shipping timeline be to order one of these to an address in Ontario, Canada? Heather

    If you select Worldwide Expedited Shipping by UPS, they guarantee delivery within 5 business days and they cover customs brokerage fees.  UPS does not give a timeline for Canada Standard, but packages usually arrive within 2 weeks.  However, Standard does not cover customs brokerage fees.  VAT/import taxes are the responsibility of the customer and will be collected by UPS prior to delivery for all packages.

  • How much is this product in NZD including shipping?

    Thank you for reaching out to us at Kabuki Strength.  Currency exchange rates change daily, so the day you purchase your item, I would check the USD versus the New Zealand dollar.  Google just told me that at 306pm PDT today it is $1.53NZD to $1USD

    In order to obtain a shipping quote, we would need the full shipping address.  Go to our website and add the items you want to your online cart.  Then, during the check-out process, you will enter your shipping address.  At that time, all shipping options for that location will auto-populate.  You may select the best option for you, based on rate and shipping time.  Most of our international customers prefer to use UPS Worldwide Expedited Shipping, since that has most packages arriving within a week and also covers customs brokerage fees.  VAT and import taxes are the responsibility of the customer and UPS will collect those prior to delivery, if applicable.