Smartwatches and Fitness Trackers for Cyclists

Sigma iD.Run HR: GPS and heart rate on your wrist

The Sigma iD.Run HR comes from Sigma Sport, a German brand known for its bike computers. Its GPS measures speed and distance, and its optical sensor reads heart rate at the wrist, without a strap. The watch displays intensity zones, an alarm when you go out of the target zone, and the time spent in it, then keeps records and monthly statistics. It offers three sports profiles, daily activity tracking thanks to its accelerometer, and recharges via cable. Data is transferred to the Sigma Link app with a simple NFC touch with the phone.

The rest of the electronics

Bike electronics are also available:

• GPS.
• Sensors and Radars.
• Home Trainer.
• Lighting.
• Batteries.

All the electronics can be found on the electronics page.

Chest strap Magene: electrical heart rate measurement

The Magene strap is worn under the pectorals and captures the heart's electrical activity, like a simplified electrocardiogram. This measurement follows the accelerations of a sprint or a hill without delay, where an optical sensor reacts with a slight lag. It communicates via both Bluetooth and ANT+, allowing it to connect simultaneously to a bike computer, a watch, and a training app. Its button battery boasts a claimed lifespan of around a thousand hours, and its waterproof casing is resistant to sweat and rain.

Making use of heart data while cycling

Heart rate reflects the actual intensity of effort, unaffected by wind or elevation like speed. Training generally occurs in five zones, expressed as a proportion of maximum heart rate: the first is for recovery, the second for endurance base, the next for tempo, threshold, and then very short efforts. For these zones to be accurate, maximum heart rate should be measured during a progressive test rather than using an age-related formula. A higher than usual resting heart rate upon waking often indicates fatigue or the onset of illness.

Good deals

Good bargains can also be found in good deals, promotions, clearance, sales, and Black Friday. The new arrivals showcase the latest collections, and items shipped in 24h are prepared and dispatched within 24 hours. The highlights of the year follow a stable order: Black Friday at the end of autumn, the end-of-year holidays, winter sales, spring French Days, followed by summer sales and back-to-school.

Frequently asked questions

Can the Sigma iD.Run HR watch be used for cycling?

Yes: its GPS records the distance and speed of the ride, and its optical sensor monitors heart rate. Although designed primarily for running, it is less readable during effort than a computer mounted on the handlebars.

Why does the heart rate strap provide more reliable values?

It reads the heart's electrical signal directly on the chest, while the optical sensor estimates pulse through the skin of the wrist. Road vibrations, cold, and tightness of the strap disrupt optical readings more significantly.

How do I pair the Magene strap with a computer?

Wet the electrodes, place the strap, then start searching for sensors on the computer or app. Thanks to the dual Bluetooth and ANT+ protocols, it connects to most devices on the market.

Should I tighten the heart rate strap tightly?

It should stay in contact with the skin without hindering breathing: adjust the strap so that it doesn’t slip when leaning over the bike. Dry electrodes give erratic values at the beginning of the ride.

How do I maintain a heart rate monitor strap?

Rinse the textile strap after each ride to remove sweat salt, which can degrade the electrodes. Detach the casing before washing it by hand, then lay it flat to dry.