By Cam Vigliotta Spring might be the season during which the natural world returns with energy and life, but so too is it an opportunity to refresh your wardrobe. Coincidentally, Reebok has embraced a resurgence of its own in recent years, making it one of the best places to upgrade everyday essentials for a great deal. While you can always find bestselling items on sale through the website, the fitness-turned-fashion brand is currently taking 35% off sitewide, plus 50% off sale items with code SPRING. Whether you’re heading back to the office, hitting the gym or just need to refresh your ward…