There's a right way to wear your Apple Watch - and it affects your data

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There's 1 mode to get accurate wellness data, and it doesn't impact buying a much precocious smartwatch. Surprisingly, getting amended information is arsenic elemental arsenic changing however you're wearing your smartwatch. 

Also: I walked 3,000 steps with my Apple Watch, Google Pixel, and Oura Ring - this tracker was astir accurate

Accuracy is everything erstwhile it comes to health trackers. Wearables companies similar Apple, Google, Oura, and Whoop person invested millions successful probe and improvement to make sensors that tin not lone observe infinitesimal shifts successful information but besides representation those details successful an actionable, adjuvant way. 

While sensor prime improves information accuracy, sensor acceptable is arsenic important. 

How smartwatch sensors work 

To recognize wherefore a choky acceptable is important for smartwatch information capture, first, it's important to recognize however the smartwatch sensors work. 

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You whitethorn spot your smartwatch glowing greenish astir your wrist arsenic you workout oregon show your bosom rate. That greenish airy is really indispensable successful signaling workout data. To continuously show your bosom rate, a smartwatch emits greenish airy onto your wrist. 

Red and greenish are complementary colors, and arsenic your bosom pumps humor during exercise, the greenish airy absorbs the reddish blood. Between heartbeats, humor absorbs little greenish light, truthful much greenish airy bounces backmost into the watch. 

Also: The champion Apple Watch of 2026: Expert tested and reviewed

These intervals of reflection are past captured by the watch's optical sensor and converted into electrical signals. These signals are tracked and converted into per-minute bosom complaint measurements.  

Why does your smartwatch's tightness matter? 

The tighter your ticker is to your skin, the little extracurricular airy interferes with this bosom complaint information capture. Exercising with a tighter ticker tin nutrient much close bosom complaint readings. 

How to correctly deterioration your Apple Watch 

Your Apple Watch should acceptable you comfortably, but it tin beryllium tighter oregon looser depending connected the enactment you're doing. For workout and bosom complaint measurements, it should beryllium comfy but tight. Try tightening your ticker earlier a workout for the astir close information capture. Loosen it for mundane wear. 

Apple recommends wearing the smartwatch conscionable supra the wrist bone. It should not beryllium connected apical of the wrist bone, arsenic it's prone to shuffling astir and an unsteady fit. 

Test your watch's tightness by shaking your wrist and turning your manus thenar up. If you consciousness your ticker losing interaction with your wrist's skin, that's a awesome to tighten your ticker band.