Delayed Onset Muscle Soreness (DOMS): What's Normal?

Nicole Herdman

Oct 5

3 min read

Delayed Onset Muscle Soreness, commonly known as DOMS, is a familiar experience for many people who engage in physical activity. Whether you are just starting a new exercise routine or pushing your limits in training, the ache that appears a day or two later can be confusing and sometimes worrying. This post will explain what DOMS is, why it happens, how to recognise normal soreness, and when to seek professional advice.

What Is Delayed Onset Muscle Soreness?

DOMS refers to the muscle pain and stiffness that typically develops between 12 and 48 hours after unfamiliar or intense exercise. Unlike the immediate burning sensation during exercise, DOMS builds gradually and can last up to a week. It mainly affects muscles that have been lengthened under tension, such as during downhill running or eccentric weightlifting movements.

The discomfort arises from microscopic damage to muscle fibres and the surrounding connective tissue. This damage triggers an inflammatory response, which causes swelling and pain. While it might sound alarming, this process is a natural part of muscle adaptation and growth.

Why Does DOMS Occur?

Muscle soreness after exercise is not caused by lactic acid, as once believed. Instead, DOMS results from tiny tears in muscle fibres and the subsequent repair process. When muscles are challenged beyond their usual workload, especially with eccentric contractions (where the muscle lengthens while under tension), these micro-injuries occur.

The body responds by increasing blood flow and sending immune cells to the affected area to repair the damage. This repair process strengthens the muscle, making it more resilient to future stress. Therefore, DOMS is a sign that your muscles are adapting and improving.

Recognising Normal DOMS

Knowing what to expect with DOMS can help you distinguish between normal soreness and injury. Typical features of normal DOMS include:

Onset: Pain usually starts 12 to 24 hours after exercise and peaks around 48 hours.
Location: Soreness is localised to the muscles worked during exercise.
Sensation: Aching, stiffness, and tenderness rather than sharp or stabbing pain.
Duration: Symptoms generally improve within 3 to 5 days.
Function: Mild soreness may reduce strength and range of motion but does not prevent movement.

If your soreness fits this pattern, it is likely normal DOMS. For example, after a long hike or a new weightlifting routine, you might feel stiff and tender in your legs or arms for a few days. This is your body’s way of signalling that it is adapting.

When DOMS Might Not Be Normal

Sometimes, muscle pain after exercise can indicate something more serious than DOMS. Warning signs include:

Severe pain that does not improve or worsens after 72 hours.
Swelling or bruising around the muscle.
Sharp or stabbing pain during movement.
Pain that limits daily activities or does not improve with rest.

If you experience any of these symptoms, it is important to seek medical advice promptly. A physiotherapist or doctor can assess your condition and recommend appropriate treatment.

Managing DOMS Effectively

While DOMS usually resolves on its own, there are several ways to ease discomfort and support recovery:

Active recovery: Gentle movement such as walking or swimming can increase blood flow and reduce stiffness.
Stretching: Light stretching may help maintain flexibility but avoid overstretching sore muscles.
Hydration and nutrition: Drinking plenty of water and eating a balanced diet supports muscle repair.
Massage: Soft tissue massage can relieve tension and improve circulation.
Heat therapy: Applying warmth to sore muscles can relax tightness and reduce pain.
Over-the-counter pain relief: Non-steroidal anti-inflammatory drugs (NSAIDs) may help but should be used sparingly.

Avoid complete rest for long periods, as this can lead to stiffness and delay recovery. Instead, listen to your body and gradually return to normal activity.

Preventing Excessive DOMS

You cannot completely avoid DOMS, but you can reduce its severity by:

Gradually increasing exercise intensity: Build up your workout load slowly to allow muscles to adapt.
Warming up properly: Prepare your muscles with dynamic stretches and light aerobic activity.
Cooling down: Gentle stretching and low-intensity movement after exercise help clear metabolic waste.
Cross-training: Varying your activities prevents overuse of the same muscle groups.

For example, if you are new to running, start with short distances and increase gradually rather than jumping into long runs immediately.

Summary

Delayed Onset Muscle Soreness is a common and normal response to new or intense exercise. It signals that your muscles are adapting and becoming stronger. You can expect soreness to start within a day, peak around 48 hours, and ease within a few days. Managing DOMS with gentle activity, hydration, and rest helps recovery. Watch out for signs that suggest injury or complications and seek professional advice if needed.

Understanding DOMS empowers you to train smarter and recover better. Next time you feel that familiar ache, remember it is part of your body’s way of growing stronger.