Gwyneth Paltrow wore track pants and a track jacket on Instagram. Rihanna, Mindy Kaling, and more stars are fans of track ...

Heart, lungs, and legs—these are the engines needed for running. The body’s built-in insulation protects the first two, but the gams present a lot of surface area that’s vulnerable to wind and cold.

A shopping writer and yoga teacher reviews the Alo Yoga Accolade Quarter-Zip Pullover, which she says is just as comfortable as pajamas, while still looking polished. Celebrities like Jennifer Lopez ...