What sensor is best for me?

You can compare our sensors on this page to ensure you make the right choice!

Do you ship internationally?

Yes, we do! We ship from the Netherlands, shipping cost depends on your location. We offer free shipping within Europe*. For businesses and all other countries, costs are calculated automatically on the website.

How long will it take to get my order?

It depends on where you are. Orders processed here will take a few business days to arrive. Overseas deliveries can take anywhere from 2-14 days. Delivery details will be provided in your confirmation email.

What if the app crash after calibration?

If the app crashes after the 10-second calibration, it may be due to GPS not being enabled on your phone. GPS access is required for the app to function properly. Solution: 1. Ensure GPS is enabled on your phone before starting a session. 2. When prompted for location permissions, grant access to the app. 3. If the issue persists, manually enable GPS for the Train.Red app in your phone’s settings.

Why can't connect my sensor via Bluetooth?

If you've followed the recommended troubleshooting steps and your sensor still won't connect, check if other Bluetooth devices are interfering with the connection. One common issue occurs with smartwatches. If a smartwatch is charging, it may automatically keep the sensor connected, even in standby mode, preventing your phone from establishing a connection. Solution: 1. Try disconnecting the charging cable from your smartwatch. 2. If the issue persists, enable Airplane Mode on the smartwatch. This will prevent it from interfering with the Bluetooth connection. 3. Once the smartwatch is in Airplane Mode, try reconnecting your sensor to the phone. This should resolve the issue and allow your sensor to connect properly. If you continue to experience problems, please contact our support team.

Train.Red at events

Experience train.red

Ready to learn more about Train.Red, experience our Muscle Oxygen Sensors and app, see Train.Red in action or want to ask some questions in real life? Visit us at one of our upcoming events.

About

Events 2026

NSCA Global Conference

24-25 October
The 10th NSCA Global Conference is the event that connects the best professionals to build the future of athletic training and physical therapy.

Sea Otter Europe

18-20 September
The cycling industry will meet at Sea Otter Europe Costa Brava – Girona. a large exhibition with international brands, a huge sports program and free bicycle tests.

mNIRS

17-19 September
We will be sponsor of mNIRS, the most important conference about muscle oxygen.

AUSFITNESS Expo

11-13 September
AusFitness Expo is the nation’s biggest and most exciting festival of fitness, live sport, active-health and nutrition.

International Mountaineering Film Festival

27–30 August
Climbsoft will be bringing laboratory-grade climbing strength diagnostics straight to the festival.

FIBO26

16-19 April
The biggest fitness show in the world. you can find us together with NSCA at Booth 8A19

NSCA Lab (level 1)

25-26 April
Train.Red will be part of the Level 1 Course from NSCA Germany. Subscribe in one the most complete strenght & Conditioning courses in the world.

hyrox coaches summit

27-28 March
We will be participating at the first Hyrox Coachens Summit in London. Our athletes Thierry Willigenberg and Hidde Weersma will represent Train.Red.

EVENTS 2025

ECSS

1-4 July
This year the European College of Sports Science Annual Congress will take place in Italy. Meet us at the SPORTEX!

Elevate 2025

18-19 June
Elevate brings new opportunities for success to every area of the physical activity & fitness sector. Our partner Stanley Sports will be representing Train.Red!

Bram Swinnen Performance & rehab

14-15 June
Bram Swinnen is one the most respected performance coaches in the world. Join him in Oslo to learn more about training methods and new insights.

WOD Science Seminar

10 May
Gommaar is one the best applying NIRS in training. Join his seminar in Horgan, Switzerland to learn how to use Train.Red in an effective way.

HYROX Paris 25

18-20 April
Our Train.Red Athlete will try to qualify to the World Championships in Chicago. Meet him there!

AERO PERFORMANCE DAY

April 17
Leading experts will share cutting-edge insights in a seminar on the most relevant topics in cycling

WoD Science Seminar

12-13 April
Gommaar is one the best applying NIRS in training. Join his seminar in Berlin to learn how to use Train.Red in an effective way.

FIBO25

April 10
The biggest Strenght&Conditioning Trade Fair in Europe! Meet us on Thusday

TEAMNL lp conference xl

25-27 Maart
In Papendal where all the best Dutch athletes and coaches meet together. Find us by the Expo!

NCSA EuroCon 2025

14-16 March
NCSA is finally in Europe, with a huge network event in Munich!

Integrated Performance Congress

22 February
Bram Swinnen and KULeuven organise a event that brings together sports scientists, trainers, coaches, and medical professionals for a day of informative sessions focused on training and performance.