Most people have heard of the circulatory system, but far fewer know about the lymphatic system—despite it playing a vital role in your immune system, recovery and overall wellbeing.

If you've been feeling puffy, sluggish, achy or like you're never quite back to your best, your lymphatic system could be one piece of the puzzle.

Running is one of the simplest and most rewarding ways to stay fit. Lace up your shoes, step outside, and you’re good to go. But for many runners, injury can quickly interrupt that rhythm.