If you’re eating “well,” exercising regularly, and still not losing weight, it can feel frustrating, confusing, and defeating. Many people assume the issue is a lack of discipline—but in reality, weight loss resistance is often a sign that something deeper is going on in the body.

Ever feel like you could sleep for 10 hours straight and still not wake up refreshed? You’re not alone. Although sleep definitely plays a big role in your energy levels, sometimes it could be an underlying condition that needs to be evaluated. Let’s take a look at common conditions associated with chronic fatigue.