Why Your Muscles Hurt Two Days After a Workout (And Why That’s Actually Normal)

If you’ve ever walked down the stairs two days after a workout and thought, “Why on earth did I do this to myself?” — congratulations. You’ve experienced DOMS.

That stands for Delayed Onset Muscle Soreness. And it can feel like someone replaced your legs with two heavy sore things that make you question your life’s choices.

I see this all the time with people training here in Upper Hutt. Someone starts exercising again after a break, they have a great first workout, feel proud… and then two days later they’re waddling around like a penguin trying to sit down.

The good news is that soreness is normal — especially when you're starting out or trying something new.

The not-so-good news? If you’re constantly wrecked after every workout, that’s usually a sign something in the training program isn’t quite right.

Let’s talk about what’s actually going on in your body when you feel sore, why it tends to peak about two days later, and how to manage it without feeling like you've been run over by a small tractor.

WHY DOMS IS WORST TWO DAYS AFTER YOUR WORKOUT

One of the strange things about muscle soreness is the timing.

You usually don’t feel it immediately after training. In fact, you might feel great when you leave the gym. The soreness normally creeps in about 12–24 hours later and peaks around the 48‑hour mark.

That’s why people often say:

“Yesterday I felt fine… but today I can barely sit down.”

This happens because soreness isn’t caused by lactic acid, which is one of the most common myths in fitness.

Instead, DOMS occurs because of tiny amounts of muscle damage and inflammation caused by unfamiliar or intense exercise (Cheung, Hume & Maxwell, 2003).

When you train — especially when doing strength exercises or movements your body isn’t used to — microscopic tears occur in muscle fibres. Your body then repairs those fibres and rebuilds them stronger.

But the repair process involves inflammation, and that inflammation is what causes the stiffness and soreness you feel a day or two later.

So in a weird way, soreness is often a sign that your body is adapting.

Just… maybe not adapting in the most comfortable way.

WHY YOU GET SORE AFTER A WORKOUT

There are a few situations where people tend to experience more soreness than usual.

The biggest one is simply doing something new.

Your muscles are very good at adapting to the types of movements they do regularly. But when you introduce a new exercise — say lunges, deadlifts, or hill walking — your body suddenly has to deal with unfamiliar loading.

That unfamiliar stimulus is what creates soreness.

Eccentric movements tend to cause the most DOMS. That’s the phase where the muscle lengthens under tension — like lowering yourself into a squat or walking downhill.

Research shows eccentric loading produces greater muscle damage and soreness compared to other types of contractions (Proske & Morgan, 2001).

In normal gym terms, that means exercises like:

• squats 

• lunges 

• Romanian deadlifts 

• step-downs 

• downhill running 

are often the biggest culprits for sore legs.

Another common reason people get very sore is simply doing too much too soon.

This happens a lot with people restarting exercise after years away.

They’re motivated. They’re excited. And they accidentally treat their first week back like a boot camp.

Which feels great… until two days later when walking down the stairs becomes an adventure.

HOW SORE SHOULD YOU ACTUALLY BE?

This is one of the most important questions people ask.

Because there’s a common belief that soreness equals progress.

And while a little soreness can be normal — especially when starting out — it shouldn’t be crippling.

A good rule of thumb is this:

Mild stiffness = normal.

Moderate soreness = acceptable.

Severe soreness that affects daily life = probably too much.

If someone is so sore they can’t move normally for three or four days, that usually means the training load was too aggressive.

Good programs aim for progress without destroying people.

If you leave every session completely wrecked, your body spends more time recovering than adapting. And that slows progress down significantly.

STRATEGIES TO REDUCE WORKOUT SORENESS

The goal of training isn’t to eliminate soreness completely — that’s not realistic.

But there are some simple strategies that can help your body recover faster and feel better.

And the funny thing is… they’re not fancy.

They’re the basics.

1. GET ENOUGH SLEEP

Sleep is where the majority of recovery happens.

During deep sleep, your body releases growth hormone and performs a lot of the tissue repair processes needed after training.

Poor sleep has been shown to impair muscle recovery and increase perceived soreness (Hausswirth & Le Meur, 2011).

So if you’re training hard but sleeping poorly, your body is trying to repair itself with one hand tied behind its back.

This is why I often tell clients:

The best recovery tool in the world is a good night's sleep.

Not an ice bath. Not a massage gun. Sleep.

2. EAT PROPERLY

Nutrition plays a huge role in recovery.

Your muscles need protein to repair damaged fibres, and they need carbohydrates to replenish energy stores.

If someone finishes a workout and then eats almost nothing for the rest of the day, their recovery will be slower.

Most people restarting exercise benefit from simple habits like:

• eating regular meals 

• including protein with meals 

• staying hydrated 

Nothing fancy. Just the basics done well.

3. GENTLE MOVEMENT HELPS

One of the most effective ways to reduce soreness is actually movement.

Light activity increases blood flow to muscles, which helps deliver nutrients and remove waste products from the tissue.

This is why gentle things like:

• walking 

• cycling 

• mobility work 

• light stretching 

can make you feel dramatically better when you’re sore.

Lying on the couch all day tends to make soreness feel worse.

Ironically, moving a little is often the best medicine.

4. BUILD UP TRAINING GRADUALLY

The best long-term strategy for reducing soreness is progressive training.

Your body adapts very quickly to repeated exercise. After a few weeks of consistent training, the same workout that once made you sore will feel easy.

This phenomenon is called the “repeated bout effect,” where muscles become more resistant to damage after being exposed to exercise (McHugh, 2003).

Which is science’s fancy way of saying:

Your body gets better at handling workouts over time.

But that only works if the program increases gradually.

WHEN SORENESS IS A WARNING SIGN

Occasional soreness is normal.

But constant soreness is not.

If someone is sore after every single workout, it often means:

• the training load is too high 

• recovery is inadequate 

• exercises aren’t appropriate for them 

• the program isn’t well designed

You don’t need to smash yourself to get results.

In fact, the people who make the best progress are usually the ones who train consistently without wrecking themselves every session.

This is something I emphasise heavily in my coaching.

The goal isn’t exhaustion.

The goal is sustainable progress.

HOW THIS FITS INTO MY COACHING PHILOSOPHY

When people train with me, one of the first things they learn is that I’m not interested in destroying them with workouts.

Sure, we train hard when it’s appropriate.

But most of the time the focus is on consistency, good technique, and building strength gradually.

Because the reality is this:

Fitness is built over months and years.

Not in one heroic workout.

When someone restarts exercise, the best program is one that allows them to come back next week feeling capable — not broken.

That’s how habits stick.

That’s how confidence grows.

And that’s how people build fitness that actually lasts.

FINAL THOUGHTS

If you’re sore after a workout, don’t panic.

It’s a normal part of training — especially when you’re starting something new.

Your muscles are adapting. Your body is learning. And with time, that soreness becomes less and less intense.

But remember this:

A little soreness is fine.

Constant soreness is not the goal.

Good training should challenge you, not destroy you.

And if your program leaves you wrecked every single week… it might be time to rethink the approach.

Your future self — especially the one trying to walk down the stairs tomorrow — will thank you.

REFERENCES

Cheung, K., Hume, P., & Maxwell, L. (2003). Delayed onset muscle soreness: treatment strategies and performance factors. Sports Medicine.

Proske, U., & Morgan, D. (2001). Muscle damage from eccentric exercise. Journal of Physiology.

McHugh, M. (2003). Recent advances in the understanding of the repeated bout effect. Sports Medicine.

Hausswirth, C., & Le Meur, Y. (2011). Physiological and nutritional aspects of post‑exercise recovery. Sports Medicine.