No muscle soreness after training: are you still making progress?

First, distinguish delayed soreness from an injury

Delayed-onset muscle soreness, usually shortened to DOMS, describes soreness that appears after activity rather than a sharp pain that starts during a particular movement. Leicestershire Partnership NHS Trust describes it as commonly occurring 24 to 72 hours later, including after an unfamiliar activity or a sudden increase in exercise.

The Trust advises seeking help from a physiotherapist, GP or NHS 111 if soreness persists or worsens. The timing alone does not establish that an unusual pain is harmless. A sudden injury during a movement and a delayed ache after an unfamiliar session need different consideration.

Should you change your next workout?

First, you are not sore and comparable performance is improving. There is no obvious reason to overhaul the routine purely to create discomfort. Continue following the programme and its progression rules. A session can be useful without providing a dramatic reminder for the next two days.

Second, you are not sore and you cannot see progress. Start by checking what you have actually compared. Have you completed the planned sessions? Are the exercises and settings consistent? What outcome were you expecting, and over what period? A programme designed around becoming stronger is not automatically a test of whether you will see a visible change in the mirror by next week.

If the work remains very easy, the effort cue in the next section gives you a reason to consider progression. If it is demanding but the pattern is unclear, bring the record to an instructor and review the goal, amount of training and recovery together. Lack of soreness alone does not tell you which of those needs changing.

Third, you are frequently so sore that you struggle with ordinary activities or miss the next session. Do not count that disruption as extra credit. Review the programme and seek advice about persistent or worrying symptoms. More pain is not a reason to add more work.

Judge the set while you do it, and progress across sessions

The 2026 ACSM position stand says training to momentary failure is unnecessary for benefits and proposes roughly two or three repetitions in reserve as a way to achieve sufficient effort. In practice, finish a familiar working set when you think a few more repetitions with the same technique remain, rather than when the exercise still feels effortless.

The estimate need not be exact to distinguish a demanding set from one you could repeat many times over. Ask about the movement you are actually doing: could you complete two or three more controlled repetitions, or another ten? If you are still learning the technique, establish that first rather than using a difficult set as a test of your judgement.

Use the effort during the exercise to judge how demanding the set was. Use comparable sessions to judge progress. Record soreness when it affects what you can do afterwards.

Imagine you can now perform ten controlled repetitions with the resistance that previously allowed eight, while keeping similar effort and setup. That is a useful performance observation even if you were not sore after either session. If you shortened the movement to reach ten, note that too; it is no longer the same comparison.

For the practical decision about repetitions and resistance, use our progressive-overload guide. You only need a brief record here: what you performed, how demanding it felt and whether later soreness affected ordinary activity or the next session.

Why the first week can hurt more than the tenth

One reason is the repeated-bout effect: repeating a familiar exercise can reduce the soreness and other damage responses it initially produced. A 2016 study of ten young men measured this during ten weeks of leg presses and leg extensions. The men had previous training experience but had done no lower-limb resistance training for at least six months.

After the first measured session, average soreness was 40 out of 100 at 24 hours and 61 at 48 hours. By week three, the corresponding scores were 10 and 8; at week ten, 8 and 8. Muscle-fibre size increased at week ten, while soreness did not significantly correlate with the measures of growth. Soreness had fallen substantially even though the programme continued to produce adaptation.

The study also measured muscle protein synthesis, the making of muscle proteins. Its initial rise coincided with the greatest damage; it tracked growth at later measurements after damage had diminished. In this small sample, the biggest early response was not the clearest growth signal. Neither soreness nor a single laboratory response described the whole training result.

That helps explain a common experience: the first week makes sitting down uncomfortable, while later sessions of the same exercise do not. You have become familiar with the task. To decide whether it needs progressing, look at the work and effort now, rather than trying to recreate the first week's ache.

Why a new exercise can leave you sore

When you lift a dumbbell in a curl, the working muscle shortens. When you lower it under control, it lengthens while still producing force. These are called concentric and eccentric contractions. Researchers writing for ACSM explain that unfamiliar, demanding eccentric work can provoke soreness and that gradual exposure matters.

This is a reason to build into unfamiliar work, not to drop every lowering phase from your routine. The word eccentric describes a type of contraction, not an injury. A new exercise or a sudden increase in its demand can make a session feel very different even when the equipment looks familiar.

A 2017 experiment in 13 untrained men deliberately removed the eccentric phase. Participants trained one arm with concentric-only curls and shoulder presses twice weekly for four weeks, while the other arm acted as a control. Loads progressed, and milk was provided as nutritional support. Researchers detected small increases in muscle size without significant changes in soreness or peak-torque strength at the measured visits.

The timing matters: measurements were taken 72 or 96 hours after sessions. The authors acknowledged that earlier damage or soreness might have been missed. This supports a narrower conclusion than 'nobody became sore': small growth occurred without an increase in soreness at those visits. It does not establish that a normal programme should omit controlled lowering or reproduce this unusual protocol.

Avoid changing exercises just to feel them again

A new movement can make a familiar training week feel different. That does not establish that it is better. If you replace exercises whenever the soreness fades, you also lose some of your ability to compare sessions on the same task.

There are good practical reasons to change an exercise: different equipment, an unsuitable setup, advice from your clinician or a revised goal. Write down the reason. Then treat the new version as something to learn and record on its own terms, rather than expecting its numbers to match the old one immediately.

If you are starting out, a repeatable two-day routine can help organise the week. Choose a manageable starting plan and learn it. You do not need to prove commitment by making every session different or by turning the final exercise into a contest with yourself.

Pain that needs a different response

After an injury, the NHS sprains-and-strains guidance advises NHS 111 for severe or worsening pain, substantial or increasing swelling or bruising, inability to bear weight or walk more than a few steps, or marked difficulty moving the area. It also advises help if self-care is not working or you have a high temperature or feel shivery.

Call 999 or go to A&E if you heard a crack at the time of injury, the injured part has changed shape or sits at an odd angle, there is numbness or tingling, or the skin turns blue or grey or feels cold. These are the NHS emergency signs; do not route them only through advice about ordinary soreness.

The CDC's rhabdomyolysis guidance advises immediate medical care for possible symptoms including muscle pain or cramps more severe than expected, tea- or cola-coloured urine, or weakness or tiredness that prevents tasks or a workout you could previously complete. A person may have only one of these symptoms. Do not wait for dark urine or every item on a list before seeking help.

The CDC describes rhabdomyolysis as a serious condition in which damaged muscle releases its contents into the blood. Symptoms cannot confirm or exclude it on their own; medical assessment and testing are needed. The distinction is between seeking care for a concerning change and trying to diagnose the cause from a training diary.

Keep a record that helps with the next session

Keep the note short enough that you will use it again. Write what you did, which version you used and anything that changed how you performed it. If soreness follows, add when it began and how much it interfered with normal activity. Avoid treating a zero soreness score as an instruction to do more.

At your next review, compare the record with your original goal. You may find that you need a clearer exercise demonstration, a more realistic schedule or professional advice about an uncomfortable movement. Or you may find that the programme is progressing and the quiet morning after training simply requires no action.