When you're struggling to walk down the stairs the day after a tough workout, should you view your soreness as proof you worked hard, or as a sign you overdid it? The truth is somewhere in between. Let's learn about where soreness comes from and how to keep it from making you miserable.
What Soreness Is
That next-day soreness isn't from lactic acid or any toxins produced during exercise. Think about it: if it were, the soreness would start at the gym and resolve over time. Instead, it's called delayed-onset muscle soreness (or DOMS) because it begins several hours afterward, and peaks (on average) around two days after exercise.