Selena Gomez, the face of Louis Vuitton and Coach, is now expanding her fashion portfolio to athleisure. The singer announced on Instagram this afternoon that she is officially a Puma partner with a fiery shot of her in a Puma sports bra and leggings: Officially a part of the fam @puma #pumapartner A post shared …

Sorry to report that Serena Williams and Alexis Ohanian’s newborn daughter has more Instagram followers than you do. Serena just made her baby girl, Alexis Olympia Ohanian, Jr., her own Instagram page, and it’s, of course, the cutest thing in the world. The superstar mom has already shared two photos — including one of Alexis …

Sculpted arms are always in season, so it’s time to say adios to the arm jiggle. Here’s a 10-minute workout to tone your arms with extra focus on the triceps. Grab a set of dumbbells, from three to five pounds, and get ready to bare arms.

Personal trainer and fitness influencer Kayla Itsines is known for transforming the bodies of her clients and followers through her Beach Body Guide program. (For proof, see all the before-and-after pics on her Instagram page.) She uses quick, high-intensity workouts that usually feature body-weight or lightweight strength moves, and she combines them with heart-pumping cardio …

From how many calories it burns to the potential downsides. Emma Frain, head of fitness at Protein World, shares the eight things a personal trainer wants you to know about HIIT training. High intensity interval training, also known as HIIT, has become incredibly popular in the fitness world. A HIIT session alternates between periods of …