VBT Measurement Guide: Capturing and Reading Bar Speed in the Field

Jul 3
8 min read

Some days the same 80kg felt light yesterday but is unusually heavy today. It happens when you didn't sleep well, when yesterday's training is still with you, or when your condition is a little flat. Yet the training plan only lists the weight. Today's readiness isn't written on the bar.

VBT (Velocity Based Training) fills in that blank. By measuring how fast the bar rises on every rep, it shows you in numbers how heavy that weight actually is for the athlete on that day. Velocity slower than usual means fatigue has built up; faster means good condition. This guide covers what values VBT gives you, and how to read them to make decisions right in the middle of a set.

What Values Does VBT Give You?

Attach a sensor to the bar and run a set, and every single rep is recorded as the values below. What you used to judge by eye — "that looked fast / slow" — now comes to you as numbers.

Value	What It Tells You
Mean Velocity (m/s)	The average bar speed across the whole rep. This is the primary metric for judging how hard that weight is on the day
Peak Velocity (m/s)	The fastest instant during the rep. Shows how explosively the athlete drove the bar
Range of Motion (ROM)	The distance the bar traveled. Checks whether depth stays consistent from rep to rep
Power	Output combining velocity and load. The stronger and faster the lift, the higher it goes
Velocity Loss (%)	How much velocity dropped as the set progressed. The key signal of within-set fatigue
Grade	A tier assigned to rep quality against set criteria

PoinT GO uses a 9-axis IMU wearable sensor to detect reps automatically, and its proprietary optimized algorithm computes these values on its own. Since PoinT GO handles which signals it reads and how it calculates them, the coach can focus purely on putting the resulting numbers to work in running the set.

One thing worth flagging: what VBT measures is the velocity and movement of the bar. It does not directly measure force (N) such as ground reaction force the way a force plate does, so power too is an output derived from movement. In exchange, it captures "how fast you drove this weight" with great accuracy. That is where VBT is strong.

Dividing Training Purpose by Velocity Zone

One reason VBT is so convenient is that mean velocity alone lets you gauge which quality you are currently training. The relationship between bar speed and training purpose is something sports science has long established.

Mean Velocity	Character of Training
Fast (about 1.3 m/s and up)	Speed-focused. Light weight, moving fast
Moderate (about 0.75–1.3 m/s)	Power / speed-strength. The zone that builds explosiveness
Slow (below about 0.75 m/s)	Strength-focused. Heavy weight, moving slowly

If the goal is power, you pick a weight that produces velocities in the power zone; if it is maximal strength, you pick something heavier and slower. Setting load by percentage alone (like 80% of 1RM) ties you to "yesterday's 1RM," but selecting by velocity lets you match "today's body." The table above splits things into three broad bands, and PoinT GO actually shows, rep by rep, which of the finer velocity zones (strength, strength-speed, power, speed-strength, speed) you landed in — so you can immediately confirm whether you are training at the intensity you intended.

Measuring VBT with PoinT GO

The field workflow is simple. The steps are the same whether you use the app (connect) or the web (coach-web).

Attach the sensor: Where you attach it depends on the equipment. For barbell movements (squat, bench, deadlift, etc.) mount it on the barbell collar with the magnet, for dumbbells and kettlebells strap it to the wrist, for cable and machine work put it on the weight stack, and for bodyweight movements wear it on the torso with the long body strap. Fixing it firmly so it doesn't wobble matters for accuracy.

Set the exercise and weight: Choose an exercise such as squat or bench and enter the set weight. If needed, you can add optional settings like a target rep count or a target velocity zone.

Get ready: Press "Ready" and stay still through a short countdown. The sensor sets its reference from this still position.

Measure: Lift the bar and reps are detected automatically. The screen shows a velocity gauge, a velocity-loss bar, and the mean velocity, peak velocity, ROM, and power of the rep you just did, in real time.

Save: When the set ends, you move to the results screen; confirm and save, and it is recorded in the athlete's history.

Half-hearted, wobbly reps or out-of-range values are filtered out by PoinT GO on its own. Since only valid reps make it into the results, the coach doesn't have to judge "let's drop this one" one by one. There is no separate calibration step either. At most, if the measurement pattern is judged unstable after a set, a prompt recommending a correction appears.

Measuring with the connect app lets you capture right there in the field on a single phone and cycle through several athletes.

How to Read the Results

Reading the values you measured is where it really counts. Get just a few things right and VBT transforms how you run a set.

Read the day's intensity from mean velocity. If the same weight comes out slower in mean velocity than usual, that weight is heavier for that athlete today. It's a sign fatigue has built up or condition has dipped, so it's fine to drop the weight a touch. Conversely, if it's faster than usual, condition is good and you can push a bit more. You match today's velocity, not the loading chart.

Use velocity loss to decide when to cut a set. As a set continues, velocity gradually falls. That amount of drop is the fatigue accumulated within the set. Repeating "just one more rep" after velocity has already fallen a lot only piles on fatigue for little return. A large body of research recommends keeping velocity loss low when the goal is power or strength, and allowing a bit more when the goal is hypertrophy. PoinT GO automatically shows velocity loss in tiers during the set, so when it hits the line you set, you can end the set decisively.

Read the trend. VBT's real power is not in a single set but in the arc over several weeks. If the weight you can handle at the same velocity zone creeps up little by little, strength has risen. Conversely, if the mean velocity for the same weight keeps falling week after week, it may signal insufficient recovery — and that's when it's good for the coach to look at sleep and training volume together.

Estimate 1RM without testing it directly. Measure velocity across several loads and a consistent relationship emerges between weight and velocity (the load-velocity profile, LVP). PoinT GO uses this relationship to estimate 1RM. Since you don't have to attempt heavy maxes often, injury risk drops. The detailed application continues in the related article below.

Watch the lowering phase too. VBT distinguishes not just the lifting phase (concentric) but also the lowering phase (eccentric). How controlled the lowering was shows up as rep quality. It's a useful reference when you want to build the habit of lowering under control rather than just dropping the bar.

Getting Data You Can Trust

If the velocity readings wobble, so does your interpretation. Just handling these in the field makes the data far more stable.

Push every rep as fast as you can. The most common mistake in VBT is lifting "comfortably." Even with light weight, you have to lift with the intent to "move it as fast as possible" for velocity to reflect true capability. Lift gently and you'll read intensity as lower than it really is.

Always attach the sensor in the same spot. For a barbell, that's the same-side collar in the same position every time. If the position shifts set to set, your velocity comparisons drift.

Measure after warming up. The first set with an under-prepped body comes out slow and is hard to treat as the day's baseline.

Keep rep depth consistent. If squat depth or bench range varies rep to rep, so do the velocity values. Cue the athlete to keep the same range.

Wait a moment after an impact. After a strong impact — such as setting the bar down hard — the sensor readings can be briefly unstable. Just give it a second or two to settle.

Managing at the Team Level

Measuring one athlete and managing a whole team are different jobs. This is where coach-web (the web dashboard) comes into its own.

Per-athlete velocity trends: Lay out how mean velocity for the same exercise has changed over time and track the rise and fall against a baseline.

Team rankings and best records: Gather each event's best records, VBT included, at a glance. Great for comparing athletes or setting goals.

Program assignment: Build measurement and training programs that include VBT, assign them to athletes, and run them as a regular measurement routine.

The flow is: measure in the field with the app, and that data is organized team-wide in coach-web. Because the app and web share the same algorithm, you get the same result for the same set no matter where you measure.

App or Web — Which Should You Use?

Both do full measurement and analysis. The difference isn't capability, it's the situation.

In the field or on the move, the connect app: With just a phone you can measure on the spot, ideal for cycling through several athletes in the weight room.

For managing a team systematically, coach-web: This is where you organize your team, permissions, and programs on desktop and compare and analyze the velocity data you've accumulated. You can also connect a sensor and measure live on the web (desktop Chrome / Edge).

Usually the natural combination is to measure in the field with the app and review it all on the web.

Frequently Asked Questions

Q. Do I need to know my 1RM before doing VBT?

No. Velocity itself is an indicator of intensity, so even without knowing your 1RM you can pick a weight that matches your target velocity zone and start right away. If anything it's the reverse: measure velocity across several loads and PoinT GO estimates your 1RM from that relationship. It's safer because you don't have to attempt heavy maxes often.

Q. Which exercises is it good for?

It fits best in compound barbell movements like squat, bench press, deadlift, and overhead press. Dumbbells and kettlebells can be measured with the sensor on the wrist, cable and machine work with it on the weight stack, and bodyweight movements with it worn on the torso. Just attach it in the position that suits the equipment.

Q. At what % velocity loss should I cut the set?

It depends on the training goal. For power or maximal strength, cut at a lower line so fatigue builds up less; for hypertrophy, allow a bit more. Start conservatively and end sets early at first, then adjust to your goal as you get used to it. PoinT GO shows velocity loss in tiers during the set, so use that to judge.

Q. Velocity varies a little from rep to rep — is that okay?

That's normal. We're human, so it varies slightly rep to rep. Rather than getting caught up in a single rep's number, it's right to read the arc of the set (mean velocity and how much velocity drops within the set). If the values are unusually erratic, it may be a sign the athlete didn't push with maximal intent or that form wobbled.