You're diligently waking up at 6 a.m., lifting weights, running, and eating relatively well. Still, no matter how hard you try, you constantly feel sore, your body feels heavy, and you're not getting stronger. While there's no one reason why this happens, it's frustrating when it does. Luckily, there's a lot you can do about it.
Here are four reasons you're always sore and not getting stronger—and how to fix it: