Articles
Long-form pieces on bar speed, training data, and how lifters and coaches use Metric in the wild.
Metric vs RepOne: a real-world accuracy comparison across six training sessions
Joe ran Metric and a RepOne linear position transducer on the same sets for two weeks. 69 matched reps across squat, bench and deadlift. Here is what the data shows — including why deadlift mean velocity diverges and what that tells us about how each device measures the bar.
Metric vs Vitruve LPT: Smith machine bench press at 1-RM (Grossi et al., 2026)
A 2026 peer-reviewed study from the University of Urbino tested MetricVBT against a Vitruve linear position transducer during Smith machine bench press at 1-RM. Peak velocity agreement was good; mean velocity was moderate. Here is what the data shows and what it means in practice.
Metric v6.9 (iOS) and v1.2 (Android): faster video processing and improved tracking accuracy
Two things changed in v6.9 and v1.2: how fast Metric processes imported video, and how accurately it measures barbell velocity — especially peak velocity. Here is the data behind both.
Metric vs GymAware: internal accuracy validation, June 2026
How accurate is Metric across different camera positions, lighting conditions, frame rates and lift types? We ran a controlled session with a GymAware tether unit as ground truth, testing iOS v6.9 and Android v1.2 across 17 sets and multiple phone setups. Here is the full breakdown.
Metric Is Now on Android
Metric VBT is now on Android in public beta. The full story — why iOS came first, the Vulkan rewrite, the Adreno GPU bug, and what's in v1.
A Guide to Rep Metrics Available in Metric
Metric tracks 12 different rep-level data points, providing insight into every aspect of barbell motion on every rep. This guide covers each metric
Eccentric Power - a new bar speed metric
Eccentric qualities are a key element overlooked in a lot of athletic development settings with traditional bar speed tracking technologies. Eccentric power is a new way to measure and track eccentric work in the gym
Time to Peak Velocity
Time to peak velocity is a useful metric for highlighting how rapidly an athlete can accelerate a load. This reveals an athletes rate of force development (RFD) and even their reactive strength index (RSI) helping coaches program effectively
The science that makes Velocity Based Training work
Explore the cutting edge of strength and conditioning with this guide to Velocity Based Training. Learn the science behind VBT and its impact on performance.
Bar path tracking | AR video playback for technique review
Metric VBT - Free bar path tracker. Record and save video with bar path, velocity, ROM and tempo data analytics.
Trends: The new way to autoregulate your training with bar speed tracking
With the new Trends feature in the Metric VBT application, you will be recovering faster on making strength gains like never before.
Concurrent validity of novel smartphone-based apps monitoring barbell velocity in powerlifting exercises
How accurate can an app be at measuring bar speed? this study compared three commercially available options: Qwik VBT, Metric, and MyLift
Validation of a commercially available mobile application, Trowell et al, 2024
A recent validation study was published by Trowell et al. (2024) comparing an early version of the Metric VBT app (v0.6.0) with 3D motion capture.
Validity and Reliability of a Mobile Application (Metric) for Velocity-based Training (VBT) in the Bench Press Exercise
We're excited to share the results of a recent validation study on Metric VBT, conducted by Antonio Šagovac as part of his Master’s studies at the University of Zagreb.
Validation & reliability of Metric VBT by Taber et al. 2023 -
Metric was found to be a valid and reliable velocity tracking solution when compared to gold-standard 3D motion capture.
2023 in review: Transforming bar speed tracking with Metric VBT
In 2023, we've taken big strides towards making Metric the most powerful velocity tracking app available
Best gym tripod for recording with your iPhone or iPad
Whatever your training style a tripod can level up your workout video. Here are the best iPhone tripods for the gym
Estimate your 1RM with bar speed data in Metric
Estimate your 1RM with Metric VBT. Use velocity based training (VBT) to calculate an e1RM every workout
5 ways to practically apply velocity based training (VBT)
Integrating velocity tracking in your training doesn't have to be difficult! Here are five of the most effective ways to use VBT in the gym
Introducing Real-Time Velocity Feedback in Metric VBT
Real-Time Feedback is now available in the Metric VBT app. Delivering audible context to track performance on every rep
Metric Pro: the new standard in bar speed tracking and VBT
Metric Pro is a barbell velocity tracking apps with a fresh approach to velocity based training
Reliability and validity of the Metric VBT beta
It is early days for our VBT technology, but we can confidently say Metric works very well already! An internal study into the accuracy of the Metric beta
Rethinking VBT for real-world coaching
Velocity based training devices are no longer essential for getting great bar speed data. It's time for velocity based training to grow and evolve.
The science of real-time bar speed feedback
The Metric VBT app now features the ability to enable real-time feedback for even more velocity based training applications in your program.
The essential guide to velocity based training
VBT can appear daunting at first. Quickly master the basics and begin training smarter with velocity.
What is the best rep speed for strength?
Is there a perfect speed to lift weights for developing strength? Maybe, but what's probably more important is tracking velocity over time!
What is velocity based training? a quick start guide to VBT
More than just lifting light weights fast, Velocity based training (VBT) opens up a world of programming and training possibilities