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No matter which Apple Watch you have, they show your fitness data in the same way — with Activity Rings. Here's what they mean and how to customize them.  

A Size 12 at Nike Isn't a Size 12 at Adidas. Why Not? You know the drill: you can wear one size from one brand, but the same size from another brand is... off — it's too small or too tight, leaving your toes cramp or your heel hurting. We dug into the reason for this discrepancy and how big—or small—our favorite brands tend to run.

Can't Find Wireless Earbuds that Fit in Your Ears? Get a Custom Fit Ultimate Ears has announced its second pair of wireless earbuds, the UE Drops, and like the company's 2020-released UE Fits, they are unique because they are custom-fitted to your ears. The new wireless earbuds also promise to deliver sound quality that's more in line with the company's high-end IEMs.

Ten Thousand Seamless Shirt Review: No Seams, All Performance Cotton is dead. At least, in the fitness realm, anyway. Today's ready-to-go workout apparel is lightweight, highly engineered and designed to keep you focused on your reps—enter: training brand Ten Thousand. We tested their technical training top to see if it could live up to its challenging moniker. 

The Reading List 

• The CEO of Allbirds shares his core workout • James Webb spots the farthest galaxy humans have ever seen• How to stay hydrated in a heat wave• A happiness columnist’s three biggest happiness rules

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