Fitness3 min
Sore Muscles After a Workout: Why DOMS Happens and What Eases It
At a glanceThe ache that arrives the morning after a new workout is usually a sign of unfamiliar effort, not damage. Gentle movement helps more than total rest.
Muscles that ache a day or two after exercise are usually showing delayed onset muscle soreness, often shortened to DOMS. It is the body's normal response to effort it is not used to, especially new exercises, heavier loads or a lot of downhill walking. The ache tends to build over the first day, peak around the second, and fade within a few days. Light movement, decent sleep and patience ease it; it rarely needs anything more.
What is actually going on
When muscles work in an unfamiliar way, particularly while lengthening under load, such as lowering a weight slowly or walking down a steep hill, tiny disruptions occur in the muscle fibres and the tissue around them. The body responds with a repair process that brings some swelling and sensitivity. That repair is part of how muscles adapt, which is why the same session usually hurts far less the second or third time.
The old idea that soreness is caused by lactic acid "pooling" in the muscles has largely been set aside; that build-up clears soon after exercise, long before the ache appears.
Normal soreness or something else?
| Usually DOMS | Worth getting checked |
|---|---|
| Dull, tender ache across a whole muscle | Sharp pain in one spot, or pain in a joint |
| Starts several hours to a day after exercise | Starts suddenly during the workout |
| Eases as you warm up and move | Gets worse with movement or keeps you awake |
| Fades within a few days | Lasts well beyond a week, or comes with marked swelling or bruising |
Seek urgent medical help if severe muscle pain after very hard exercise comes with weakness, a lot of swelling or unusually dark urine. These are rare, but they need prompt attention.
How to relieve sore muscles
- Keep moving gently. An easy walk, a slow bike ride or light housework increases blood flow and often takes the edge off the stiffness better than staying on the sofa.
- Stretch softly. Gentle mobility can make sore legs feel looser, even if it does not speed up the repair itself. Our guide to the benefits of stretching has short routines that fit into ordinary days.
- Use warmth or cold for comfort. A warm bath or shower relaxes some people; a cool pack suits others. Choose whichever feels better.
- Try light massage. Rubbing the area yourself or using a foam roller gently can feel soothing. Some people book a professional session after a demanding event, and our article on choosing a mobile massage provider covers what to check first.
- Eat and drink normally. Regular meals with some protein and enough fluids support the body's repair work.
- Sleep. Much of the recovery happens overnight, and a run of short nights makes everything ache more; our piece on whether 6 hours of sleep is enough looks at what too little rest adds up to.
Over-the-counter pain relief is something to discuss with a pharmacist, particularly if you have other health conditions or take regular medicines.
Preventing the worst of it next time
Some soreness is hard to avoid when you try something new, but you can keep it mild:
- Start a new routine with fewer sets, lighter loads or shorter distances than you think you can manage.
- Add one change at a time, such as more weight or more hills, not both together.
- Warm up with a few minutes of easy movement before the main effort.
- Repeat the activity within the next week or so; consistency is what makes later sessions hurt less.
That approach applies equally to a first walk with a hill and to a first week on a home cable station; our guide to affordable cable machines also stresses starting lighter than you expect.
Quick answers
Should I train while I am still sore?
Light activity is usually fine and often helps. Heavy training of the same very sore muscles is best left until the ache has mostly gone, or switch to a different muscle group for a day.
Does soreness mean the workout was good?
Not necessarily. Soreness mostly reflects how new the effort was, not how much progress you made. Plenty of useful sessions leave no ache at all.
Do supplements prevent DOMS?
Various products are promoted for recovery, but none replaces sensible loads, food and rest. If you are curious about one of the better-known options, our explainer on what creatine does sets out what it is used for, and a pharmacist can say whether it suits you.
