Often we reach for coffee, sports drinks, or even (yuck) energy drinks to help us make it to that after-work HIIT training class. But before you gulp down a sugary or heart-racing formula, try a more natural option: a beet-infused, homemade juice. Madeleine Murphy, the co-founder of Montauk Juice Factory (a chic Hamptons juice shop in New York), whipped up this zesty concoction. It will ensure you get through even the toughest cardio or strength classes and still have enough fuel left for evening cocktails with your crew (Madeleine notes that it's also a great preparty drink). It's not magic — just a savvy way to combine ingredients to increase blood flow and deliver a crazy amount of sustainable energy. Plus, the spicy kick of jalapeño provides a powerful metabolism boost! So lace up your sneakers, plug in your blender, and keep reading!