Is Soreness a Sign of a Good Workout?

Not necessarily. Soreness tells you that your muscles experienced stress they weren't fully adapted to. It doesn't tell you whether the workout was productive, well-structured, or moved you closer to your goals.

Why people believe this

Soreness feels like proof that something happened. You pushed hard, you feel it the next day, so the workout must have been effective. This belief is reinforced by the "no pain no gain" culture in a lot of training environments. When you're not sore, it can feel like you didn't do enough.

There's also a timing element that makes it convincing. Delayed onset muscle soreness (DOMS) shows up 24-72 hours after training, which is right around when you're heading back to the gym. So the soreness becomes mentally linked to the training cycle even though the relationship between soreness and actual adaptation is weak.

What's actually true

Soreness is mostly a signal of novelty, not quality. You get sore when you do something your body isn't used to: a new movement, a higher volume than normal, or eccentric loading you haven't done recently. As your body adapts to a training stimulus, soreness decreases even though you're still improving.

Experienced athletes who follow consistent programs often aren't very sore, and their training is still highly effective. Meanwhile, someone who does a random workout they've never tried before might be extremely sore and get very little long-term benefit from it.

Extreme or persistent soreness can also be a sign of too much volume or not enough recovery, which isn't productive.

What to pay attention to instead

Track how your sessions feel, whether you're progressing over weeks (more weight, better technique, faster times), and how your body responds to your training load. Those are better indicators of whether your training is working than how sore you are the next day.

If you want to track your session ratings, training load, and daily check-in scores over time, Sherpa is a free app that helps you notice the patterns that actually matter.