Threshold testing made simple
Know exactly where your training zones begin.Reveal your true aerobic and anaerobic thresholds using your breathing. No lab visits, no masks, and no blood testing required, just a simple test through the app.
Buy with confidence
Fast Free Shipping
2-day delivery where available
Risk Free Purchase
Return within 30 days for full refund
World Class support
Get help when you need it
Free trial month
For new Tymewear members
Lifetime warranty
As long as you have an active membership.
Explore the features
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Train with ventilation, not guesswork
A clearer signal of real training intensity.Minute ventilation is one of the most reliable indicators of effort. While heart rate can drift during long sessions, breathing stays honest showing exactly which zone you're actually training in.
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Personalized, data-driven training plans
Your physiology, your training plan.Translate your breathing data into daily training recommendations tailored to your current fitness. No generic plans, just guidance designed for your body.
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A training library built for you
Workouts designed around your physiology.Access a training library built around your unique thresholds. Your breathing data translates into real-time intensity targets, guided workouts, and personalized recommendations, aligned with your fitness.
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Guided workouts hit the right intensity, every time
Guided workouts keep you in the right zone.Train with real-time intensity targets based on your breathing thresholds. Tymewear guides you through each session so you stay exactly where you should without over- or under-training.
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See your progress in real time
Watch your fitness evolve.Track how your thresholds, endurance, and capacity improve over time. Every test gives you a clear picture of how your training is working.
Why athletes choose Tymewear
Tymewear measures breathing directly to reveal your true training thresholds. No masks, blood tests, or expensive lab visits required.
Heart rate can drift during long sessions, breathing stays honest, showing exactly which zone you're actually training in.
Real-time ventilation guidance shows exactly how hard you're working so you can stay in the right zone every session.
Your data powers personalized workouts and recommendations that evolve as your fitness improves.
Track your thresholds and performance over time so you can clearly see how your training is paying off.
Member spotlight
“The test results have help refine my training zones, and now I set my zones using the Tymewear test. I even compare them to lactate tests.”
Jen Lemen
Wiltshire, UK
Member spotlight
“Ventilation data has given us a better tool on the bike, especially outside, to monitor and target time in zones. With the recent software updates improving reliability and repeatability, VitalPro is now a critical part of my training.”
Greg Heath
Canada
Member spotlight
“Breathing data provides an additional view and insights. It’s an amazing device for a numbers geek or serious athlete looking for deeper training insights.”
Zilvinas Ace
Vilnius, Lithuania
Member spotlight
“The results helped me change my training plan with my coach to improve my endurance and VT1 zone. I would recommend it.”
Flip Jansen
Netherlands
Member spotlight
“The best value way to set your training zones accurately, especially at the lower end. Since my second test I’ve started adding more VO2max sessions and my training has become more polarized.”
Ian
London, UK
Member spotlight
“The test results have help refine my training zones, and now I set my zones using the Tymewear test. I even compare them to lactate tests.”
Jen Lemen
Wiltshire, UK
Lab-grade insight without the lab.
Tymewear measures breathing directly to reveal your true training thresholds. No masks, blood tests, or expensive lab visits required.
Member spotlight
“Ventilation data has given us a better tool on the bike, especially outside, to monitor and target time in zones. With the recent software updates improving reliability and repeatability, VitalPro is now a critical part of my training.”
Greg Heath
Canada
Ventilation reveals your true training intensity.
Heart rate can drift during long sessions, breathing stays honest, showing exactly which zone you're actually training in.
Member spotlight
“Breathing data provides an additional view and insights. It’s an amazing device for a numbers geek or serious athlete looking for deeper training insights.”
Zilvinas Ace
Vilnius, Lithuania
Train with clarity, not guesswork.
Real-time ventilation guidance shows exactly how hard you're working so you can stay in the right zone every session.
Member spotlight
“The results helped me change my training plan with my coach to improve my endurance and VT1 zone. I would recommend it.”
Flip Jansen
Netherlands
Training that adapts to you.
Your data powers personalized workouts and recommendations that evolve as your fitness improves.
Member spotlight
“The best value way to set your training zones accurately, especially at the lower end. Since my second test I’ve started adding more VO2max sessions and my training has become more polarized.”
Ian
London, UK
Built for long-term progress.
Track your thresholds and performance over time so you can clearly see how your training is paying off.
What makes Tymewear different
Most training tools measure output through heart rate, power, or pace. Tymewear adds a new signal: breathing. By measuring ventilation directly, it reveals how your body is truly responding to effort, unlocking lab-grade insight into your real training zones and intensity.
Heart Rate
Tracks your cardiovascular system response. Heart rate has long been a trusted metric for monitoring effort and endurance during training.
Power & Pace
Measure the work you produce. Power and pace show the output you generate during training, revealing strength and speed.
Tymewear adds Breathing
Breathing reveals what other metrics can't. Ventilation directly reflects metabolic demand, making it one of the most reliable indicators of exercise intensity. By measuring breathing, Tymewear identifies your true physiological thresholds and shows exactly which training zone you're in.
Tech specification
What's in the box
Breathing sensor
Heart rate sensor
Extender strap
Opener tool
Battery (CR2032)
Heart rate sensor
Extender strap
Opener tool
Battery (CR2032)
Sensors
Silicone EAP measures breathing rate and volume
Heart Rate Monitor captures accurate HR and HRV
Accelerometer and Gyroscope tracks movement
Heart Rate Monitor captures accurate HR and HRV
Accelerometer and Gyroscope tracks movement
Weight and Dimensions
Width: 3.2 cm
Length/Small: 63-76 cm
Length/Regular: 76-114 cm
Weight: 2 oz
Length/Small: 63-76 cm
Length/Regular: 76-114 cm
Weight: 2 oz
Quality Materials
Fiber reinforced plastic
High tech elastic band
Water resistant
Minor scratches from regular wear are normal
High tech elastic band
Water resistant
Minor scratches from regular wear are normal
Compatibility
Supports metric and imperial units of measurement
Tymewear app is available in English
Compatible with iOS, Android, Garmin IQ
Integrates with Garmin, intervals.icu, WK05
Tymewear app is available in English
Compatible with iOS, Android, Garmin IQ
Integrates with Garmin, intervals.icu, WK05
Battery life
600 hours of battery life
Uses over the counter CR2032 Batteries
Uses over the counter CR2032 Batteries
Connectivity
Bluetooth Low Energy 5.3
30ft connection range
Up to 4 simultaneous device connections
Firmware updates via Tymewear App
EMF- safe
FCC-certified
30ft connection range
Up to 4 simultaneous device connections
Firmware updates via Tymewear App
EMF- safe
FCC-certified
FAQs
How does Tymewear improve my training?
Tymewear improves your training by measuring what matters most: your body's actual response to training. The chest strap detects your metabolic thresholds through breathing and translates them into personalized training zones. With a simple 20-minute ramp protocol, you'll unlock a complete fitness profile including your aerobic threshold, anaerobic threshold, and VO2max. This isn't just data – it's your blueprint for optimal training
What makes Tymewear's approach unique?
While other devices estimate your training zones using generic formulas, Tymewear measures your actual physiological response. Our chest strap tracks both your breathing metrics and heart rate, giving you insight into your body's metabolic state in real-time. This means you're not training based on population averages – you're training based on your unique physiology.
What size should I choose?
The strap comes in two adjustable sizes:
- Small: 63-76 cm (24.8-29.9 inches)
- Regular: 76-114 cm (29.9-44.9 inches)
Each strap comes with Tymewear’s adjustable fitting system for a perfect fit.
What makes Tymewear different from other fitness devices?
Tymewear is the first wearable that accurately measures metabolic thresholds through breathing. While other sensors and wearables rely on generic heart rate formulas with up to 29% error margins or power zones that don’t take your physiology into account, our dual-sensor technology provides lab-grade accuracy. Tymewear ensures your training zones are personalized to your physiology, not estimated from population averages.
What sports can I use Tymewear for?
While you can collect data from most endurance activities, our validation and analysis are specifically tuned for these core sports.
- Running
- Cycling
- Cross-country skiing
How do I set up my Tymewear device?
Setup is straightforward:
- Put on the chest strap, ensuring a snug but comfortable fit
- Download the Tymewear app (iOS, Android, Garmin IQ)
- Connect via Bluetooth
- Complete your initial threshold test
- Start training with personalized guidance
The test takes 20-30 minutes and involves:
- An easy warm-up
- Gradual intensity increase
- Only 3-6 minutes at high intensity.
How often should I use Tymewear?
While you don't need to track every workout, more frequent use provides better insights into your training patterns and progress. Each session helps refine your personalized training recommendation.
What does the breathing sensor measure?
The Tymewear breathing sensor measures Breathing Rate, Tidal Volume, and Minute Ventilation. Breathing rate is how fast you breathe, tidal volume is how much air is breathed out per breath, and Minute Ventilation is the flow rate of the air exhaled over time.
Breathing Metrics:
- Tidal Volume (air volume per breath)
- Breathing Rate (breaths per minute)
- Minute Ventilation (air volume per minute)
Performance Metrics:
- Heart Rate
- Player Load
- Ground Contact Time
- Air Time
- Cadence
- Elevation Changes
Why are thresholds important for training?
Your thresholds are the key transition points where your body shifts between energy systems. Training research shows that athletes using accurate threshold-based training improve 2.5x faster than those using standard heart rate zones. In fact, in a 12 week long randomized control study, 100% of subjects who received training based on their individual thresholds improved their fitness level as measured by VO2max. In the group that received training based on Heart Rate Reserve training zones, only 40% improved their fitness. That means 60% of the Heart Rate based training subjects did not improve their fitness level despite 12 weeks of training.
Why measure three thresholds instead of one?
Most training systems rely on a single threshold (like FTP or max HR) to estimate all other training zones. Tymewear measures each threshold independently because they're unique to your physiology. This precision allows for truly personalized training zones and a better training recommendation. This will help you improve faster.
Will my training zones evolve?
Absolutely – and that's where Tymewear gives you a real advantage. As your fitness improves, we continuously analyze your performance data to detect threshold changes and adjust your training zones. This means your training guidance evolves along with your improving fitness, ensuring you're always training at optimal intensities for your fitness level.
How do I care for my Tymewear strap?
- To maintain optimal performance:
- Rinse with water and mild soap after use
- Air dry
- Replace batteries when indicated (typically every 600 hours)
The CR2032 batteries provide:
- 600 hours of typical use
- 200 hours in researcher mode
- 10 hours of internal data storage
Is the strap waterproof?
The strap has an IPX7 rating, making it water-resistant to 1m and sweatproof.
What are the connectivity features?
- Bluetooth Low Energy 5.3
- 30ft typical connection range
- Up to 4 simultaneous device connections
- Compatible with iOS, Android, Garmin IQ
- Integrates with Garmin, intervals.icu, WK05
What features are included in the free app?
The Tymewear app turns your data into actionable insights:
- Personalized training zones
- VO2max assessment
- Real-time breathing and heart rate data
- Workout tracking
What additional features come with the training membership?
The Tymewear training membership allows you to target intensities specifically designed to help you improve faster with personalized workouts. Here is a full list of features the training membership adds on top of the free app:
- Detailed fitness assessment
- Optimal training distribution
- Daily workout recommendations
- Customized workout library
- Advanced performance metrics
- Training adaptation tracking
Need Support?
Our team of training experts is ready to help at support@tymewear.com. For replacement parts or technical assistance, we'll ensure you get the support you need to keep training at your best.
What's your return policy?
We offer a 30-day risk-free trial. If you're not completely satisfied, contact support@tymewear.com for a hassle-free return.
What's covered by the warranty?
Our one-year limited warranty covers manufacturing defects and hardware malfunctions. Individual components can be replaced if needed.
Need more help?
Our support team is ready to assist at support@tymewear.com. For wholesale inquiries, please contact support@tymewear.com.
Disclaimers
Orders are sent from the US or EU. Customs duties, fees and taxes may be applied on imports. Please factor in these costs as they are not included in the cost or purchase or shipping.
30 day returns. This is an automatically renewing subscription. Each membership automatically renews unless canceled. You may cancel your membership at any time via tymewear.com/manage-membership and your membership will not renew.
Please note that our products are sold exclusively to individual consumers (B2C). We do not process Business-to-Business (B2B) transactions through this website.
If you are a business interested in purchasing our products, please contact us directly at sales@tymewear.com to discuss available options for business orders.