Nothing motivates one to get back into the gym more than adding a few pieces to your workout wardrobe. Upgrade those yoga pants and try the advanced-level class instead. Get the Lululemon tank with wicking, and finally sign up for the rock wall you’ve been eyeing over the past three months. One action begets the other. It’s practically Pavlovian. From wearable tech to smart sneakers and more, these are the activewear picks ShopStyle editors are buzzing about.