What is PACER

First

PACER is a wearable, built for personal CPET

- fitness testing that is based on breathing data.

A runner wearing PACER stretching, with the PACER companion app screen

No extra gear needed. No coach or technician required.

PACER delivers precise results on its own.

Learn How to Use PACER

Second

Designed for comfort — it won't interfere with your breathing.

Waterproof and sweat-ready. Built to handle any weather.

PACER with the mask and sensor parts separated

Detachable module for easy cleaning,

Designed for long-term, hygienic use.

Third

Trusted by pro teams for its lab-grade precision,

PACER rivals the reliability of high-end testing equipment.

See Collab with USAT

Side view of a USAT athlete running while wearing PACER

KEY METRICS

Until now, most people tracked their training with a watch.

However,

VO2MAX

Max oxygen uptake

Lactate threshold

Running economy

and more,

These key performance metrics can only be accurately measured through breathing data.

PRODUCT COMPARISON

Item / Product	NEUMAFIT PACER	Company C’s precision testing device	Company G’s smartwatch
Price	$549	$15,000+	$799
VO2max	Direct	Direct	Estimated
LTP (Lactate Pace)			Estimated
Fatmax
CHO/Fat Ratio
Real-Time Breathing	AI Auto	Expert Needed
No Calibration	Auto Setup	Manual Setup
App Support
Self Test		Expert Needed
Test Time	About 30 min	60–90+ min	None
Need Reservation	Not Needed	Yes (Visit Center)	None

PACER accurately measures 20+ metrics in just about 30 minutes.

No other device matches PACER in precision, cost, and accessibility.

See All Metrics PACER Measures

TRAINING GUIDANCE

Don’t worry about the numbers — PACER makes sense of them for you.

PACER delivers insights derived by AI-based analysis,

Energy gel intake timing,

Ideal marathon pace,

Workout strategies,

and more.

PACER interprets the data for you,

so everyone can train like a pro.

PACER APP

Works with both Android and iOS, and connects to PACER via Bluetooth.

Pacer for Running

Pacer for Cycling

No subscription required, No additional fees. Start training like a pro with the PACER app.

Frequently Asked Questions

What types of workouts can I use PACER for?: PACER works with a wide range of aerobic exercises like running and cycling. It's designed for both outdoor activities and indoor settings like treadmills or stationary bikes.

Is it uncomfortable to breathe while wearing PACER?: Not at all. PACER is designed to stay out of the way of your breathing. Many runners and cyclists use it for extended sessions with high satisfaction.

Can I wash it with water?: Yes. PACER has a detachable module that lets you rinse only the parts that need cleaning. It's easy to maintain and hygienic for repeated use.

How is it different from a smartwatch?: Smartwatches typically rely on heart rate data. PACER, on the other hand, directly measures your breathing to give deeper insights into your body’s metabolic response during exercise. That means more accurate understanding of your intensity and fitness level.

Do I need to understand VO₂max or LTP to use it?: Not at all. Even if you’re new to these terms, the PACER app interprets the results for you and explains them in a simple, user-friendly way. It's beginner-friendly by design.

Do I need to connect it to my phone?: Yes, PACER connects to your smartphone via Bluetooth during testing. The app collects and analyzes the data, then shows you the results right away.

How accurate is the data analysis?: PACER delivers lab-level accuracy — it's even used by professional sports teams. Because it’s based on real breathing data, it provides insights that go beyond what typical wearables can offer.

When should I use it?: It’s great before or after training to check your current fitness, or on a regular basis to track progress. Even just once or twice a week — or monthly — can help you build a more effective training plan.

Is it beginner-friendly?: Absolutely. PACER is built for all levels, including beginners. The app guides you through everything, with no need for prior knowledge or technical experience.

How long does the battery last?: A full charge gives you up to 5 hours of continuous use — more than enough for a full day’s workouts. Charging is quick and easy via USB-C.

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