Delayed onset muscle soreness: how long it lasts and when it is an injury

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Your Health Magazine Contributor

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Delayed onset muscle soreness: how long it lasts and when it is an injury

Ache that shows up a day or two after a hard session is common. Most of the time it means nothing. The catch is that a real injury can feel much the same in the first few hours, so plenty of Australians rest a strain that never needed it, or push on through pain that was only ever stiffness. Knowing which is which saves you from both mistakes.

This guide covers delayed onset muscle soreness: how long it normally lasts, and the signs that a niggle has turned into something a physiotherapist should look at.

What delayed onset muscle soreness actually is

Delayed onset muscle soreness, usually shortened to DOMS, is the ache that turns up after you do something your body is not used to. A first week back at the gym. A longer run than usual. A day of heavy gardening, or just more reps than last time. What links them is unfamiliar load, particularly movements where the muscle lengthens under tension, like lowering a weight or running downhill.

The soreness comes from small, normal disruptions to muscle fibres and the mild inflammation that follows as the tissue repairs. That repair is how muscles adapt and grow stronger, which is why DOMS eases off as you get fitter and repeat the same activity. It signals a new demand, not damage of the kind an injury causes.

DOMS has a recognisable feel. The ache is dull and spread out rather than a sharp point. Tenderness runs across a whole muscle group, usually on both sides if you trained both. Stiffness bites hardest when you first move after sitting, then loosens once you warm up, and there is no swelling or bruising, and no real loss of function beyond feeling stiff and tender.

How long it should last

DOMS tends to show up 24 to 72 hours after the activity, which is part of why it catches people out: you can feel fine on the day and wake up stiff two mornings later. It usually peaks around the second day, then fades over the next few as the muscle recovers. For most people the whole thing is done within two to five days, and light activity tends to clear it faster than lying still. If it is still there after a week, or getting worse rather than better, that timeline is your first clue you may be dealing with more than ordinary soreness.

What helps it settle

You cannot rush the repair, but you can stay comfortable and keep moving while it happens. Gentle movement, a walk or some light stretching, brings blood to the area and eases stiffness better than rest. Drink enough water and eat enough protein to back up the recovery already under way.

Heat loosens a stiff muscle before activity, and a warm shower often takes the edge off first thing. There is no need to hammer the same sore muscles again straight away. Work a different area or drop the intensity, and let the ache fade. Going back to full effort too soon, again and again, is how a manageable load becomes a real strain.

When soreness is actually an injury

Here the two problems part ways, and so does the way you handle them. Ordinary soreness builds gradually, spreads across the muscle, hits both sides evenly and lifts within a few days. An injury behaves differently: pain that is sharp or pinned to one spot, pain that arrives during the movement itself rather than a day or two later, swelling, or an ache that will not shift after a week. The Brisbane practice Pivotal Motion Physiotherapy has a physiotherapist-written guide that explains the difference between soreness and injury, including how long ordinary DOMS should last (roughly two to five days) and the specific symptoms that mean it is time for a hands-on assessment rather than another rest day. If pain is one-sided, or it lingers and worsens instead of easing, that is your cue to book a physiotherapist rather than push through.

Some patterns deserve attention straight away rather than a wait-and-see:

• Pain that hit suddenly during the activity, sometimes with a pop or a sharp catch
• Pain concentrated in one spot, especially near a joint or tendon
• Visible swelling or bruising, or a muscle that feels hot
• Weakness, or trouble putting weight on the area or using it normally
• Pain that keeps you awake at night, or that is no better after a week of sensible rest

Any of these points to a strain, tear, tendon or joint problem rather than plain soreness, and loading it further only drags out the recovery.

When to get it assessed

Ordinary DOMS does not need a professional. It clears on its own, and you do not need a check-up every time you feel stiff after a big session.

The reason to see someone is a symptom that breaks the DOMS pattern: pain that is sharp, one-sided, swollen, or still hanging around well past that two-to-five-day window. A physiotherapist can watch how the area moves and work out whether the tissue involved is muscle, tendon, ligament or joint, then tell you what is safe to keep doing while it heals. That matters most if you are training toward an event or coming back from an old injury, especially when the same niggle keeps returning.

If your soreness is acting like the DOMS described here, give it a few days of light movement and it will most likely pass. If it is not, book a physiotherapist and get it looked at properly rather than gambling on tomorrow being the day it finally eases.