A study published earlier this year found that social media is a powerful weight-loss tool. Researchers found that obese men and women who had a support system through Twitter were more likely to lose weight. While weight loss isn’t everyone’s goal, being fit and healthy is something we can all benefit from. That’s why we love to follow these 14 DC folks on Instagram as they share their passion for fitness, health, and nutrition. We hope they’ll also inspire you to stay fit, eat right, and live smart.