PUSH Band alternative for VBT

WHOOP has acquired PUSH. As a result, you can no longer train with PUSH or buy a PUSH band 2.0 for your velocity based training. The entire PUSH VBT system got shut down (portal, app and hardware). But we’ve got you covered!

Train with PUSH band alternative: FLEX

All PUSH band owners can now get a whopping discount on the best PUSH band alternative: FLEX by GymAware. Use code PUSHTOFLEX10 in the coupon section to get your discount!

Learn more about FLEX: the best alternative to the PUSH band 2.0.

GymAware FLEX

While PUSH used an accelerometer (IMU) that was scientifically proven to be inaccurate, the FLEX device uses laser optic technology that measures vertical and horizontal bar position relative to the ground. By differentiating this position data you get highly accurate velocity measures. Continue reading for scientific validation studies and user reviews.

While the PUSH Band 2.0 was wrist worn, the FLEX unit is attached at the end of a barbell.

FLEX is the best alternative to the PUSH band 2.0 for VBT

GymAware FLEX, attached to the end of a barbell, above a reflective mat.

GymAware FLEX can be used for all barbell exercises, including (barbell) jumps.

FLEX Stronger App – Android/iOS

The FLEX Stronger app (iOS and Android) is for free and doesn’t require a subscription or monthly payment. It is a good alternative for the PUSH Band app.

It even measures bar path in video mode.

Bar path video analysis Olympic power snatch in FLEX app

FLEX Stronger app in video mode.

The FLEX Stronger app is built for the needs of individual athletes, remote coaches and personal trainers. You can add other lifters into your session for group training with up to three people.

The FLEX Stronger app is available on iOS and Android.

Push band ecosystem alternative: FLEX

Scientific validation

Validation FLEX vbt device

The GymAware linear position transducer (LPT) has been around for more than 20 years. The knowledge and experience helped us to create the world’s first and only laser based VBT device – FLEX. Science shows that this was done successfully.

An independent scientific validation concludes that:

“The FLEX provides valid and reliable mean concentric velocity outputs across a range of velocities. Thus, practitioners can confidently implement this device for the monitoring and prescription of resistance training loads.”

To be a bit more specific: the typical error of the FLEX was 0.03 m/s in the back squat and 0.04 m/s in the bench press. This was measured in a wide range of loads (20-90% 1RM) and therefore a wide range of velocities (1.09 – 0.30 m/s).

When you put two FLEX units on a barbell, the inter unit variance was less than 4%. Between-day variability turned out to be very low too (<4%).

In other words: both the GymAware RS and the GymAware FLEX are highly accurate and reliable.


Weakley, J., Chalkley, D., Johnston, R., García-Ramos, A., Townshend, A., Dorrell, H., Pearson, M., Morrison, M., & Cole, M. (2020). Criterion Validity, and Interunit and Between-Day Reliability of the FLEX for Measuring Barbell Velocity During Commonly Used Resistance Training Exercises. Journal of strength and conditioning research, 34(6), 1519–1524.

Reviews FLEX vbt device

Scientists agree on the value of the FLEX unit, but how about coaches and practitioners in the field?

Discover countless authentic user videos on the GymAware instagram feed or FLEX instagram feed and have a look at the tagged section as well. Rather dive into some in-depth review articles? We listed some below.

Note that we listened to their feedback and therefore implemented most of their suggestions already. For example: 

  • Embedded camera recording within the FLEX Stronger app
  • Eccentric metrics
  • Exercise assist
  • App on iOS and Android

Joel Smith, founder of Just Fly Sports

“The device is lightweight, easy to set up, accurate, and futuristic-looking.”

Read the full FLEX review (June 2020).

Julian Chua, PhD in Sports Engineering

“I can tell that a lot of thought has been put into the design of the user interface and experience.”

Read the full FLEX review, part I (March 2020).

Read the full FLEX review, part II (June 2020).

More reviews:

“I was able to just train without the odd feeling of trying to work with a system – the system worked for me. The app is clean, responsive, and intuitive. I feel that it’s one of the better apps out there.”

Read the full FLEX review (December 2019).