Is Muscle Soreness a Sign of a Good Workout?

SORENESS AND RECOVERY · RECOVERY AND HABITS

You tried a new class or added weight to your squats, and two days later the stairs feel like a negotiation. That ache is common and usually harmless, but it makes a poor scorecard for how well you trained.

Muscle soreness after exercise is one of the most misunderstood parts of training. Some people chase it as proof of effort; others read it as a sign they are too out of shape to keep going. Neither view holds up well. This article explains what causes delayed-onset muscle soreness, why it is an unreliable measure of progress, which recovery strategies have the best evidence behind them, and the warning signs that point to something more serious.

What delayed-onset muscle soreness is

The American College of Sports Medicine describes delayed-onset muscle soreness, or DOMS, as a side effect of the repair process that follows when unaccustomed loads cause microscopic damage in muscle. It typically begins 12 to 24 hours after exercise, is most painful between 24 and 72 hours, and usually lasts three to five days.

The movements most likely to cause it involve muscles lengthening while they produce force, known as eccentric work. ACSM’s examples include the lowering phase of a biceps curl and the braking action of your thigh muscles as you go downhill. That is why a long descent on a hike, a first set of lunges or a class full of squats can leave you sorer than a much longer workout you are used to.

Soreness is especially common when you start something new, return after time away, or make a sudden jump in volume or intensity. It does not mean you have done lasting harm, and it is not reserved for any particular age or fitness level.

Why muscle soreness is a poor measure of progress

It is tempting to equate soreness with a productive session, but the evidence says otherwise. In a 2013 review in the Strength and Conditioning Journal, Schoenfeld and Contreras concluded that the usefulness of DOMS for judging workout quality is inherently limited and that it should not be used as a definitive gauge.

Two observations explain why. First, soreness tends to fade when a muscle is exposed to repeated bouts of the same exercise, even though that muscle can keep growing. Second, people vary widely: some muscles appear more prone to soreness than others, and there seems to be a genetic component. ACSM puts it plainly: pain does not need to be present to achieve gains in fitness.

Better markers of progress live in a training log: lifting a little more, completing extra repetitions, walking farther at the same effort or finding daily tasks easier. Our article on the first signs of getting stronger lists several worth tracking.

What helps, according to the evidence

A 2018 systematic review with meta-analysis in Frontiers in Physiology, by Dupuy and colleagues, pooled 99 studies on post-exercise recovery techniques. Massage emerged as the most powerful technique for recovering from both DOMS and fatigue. Active recovery, compression garments, water immersion, contrast water therapy and cryotherapy produced small to large reductions in soreness. Stretching had no significant effect.

Ryan Lingor, a primary care sports medicine physician at Hospital for Special Surgery, offers a similar practical view: the best thing is low-impact activity, along with staying hydrated, recovering adequately after hard sessions and eating healthy carbohydrates and protein afterward. ACSM adds that ice packs, massage, acupressure and oral pain relievers may ease symptoms. If you have kidney, stomach or heart concerns or take other medicines, check with a pharmacist or doctor before relying on pain relievers.

Strategy	What the evidence suggests	How to use it
Light activity	Active recovery reduced soreness in the Dupuy review; favored by HSS	15 to 30 easy minutes of walking or cycling the next day
Massage	The most effective technique in the Dupuy review	A professional massage, or gentle self-massage
Compression garments	Small to large reductions in soreness	Optional, after long hikes, rides or races
Cold or contrast water	Small to large reductions in soreness	A cool shower or bath, if you enjoy it
Stretching	No significant effect on soreness	Keep it for mobility, not for soreness relief
Food and fluids	Recommended by HSS as part of recovery	Water, carbohydrates and protein after training

For the protein side of recovery, our guide to how much protein you need to build and keep muscle covers daily targets and timing.

How to train while you are sore

Mild soreness is rarely a reason to skip movement altogether. Gentle activity often eases stiffness, and the first few minutes of a warm-up usually feel the worst. A few guidelines help you keep momentum without making things worse:

• Choose a lighter day. Easy walking, cycling, swimming or mobility work all count.
• Train something else. If your legs are sore, an upper-body session can still go ahead.
• Reduce the load. If you train a sore muscle group, use lighter weights and fewer sets.
• Warm up longer. Let the first sets be deliberately easy before you decide how the session will go.
• Stop if it changes. If soreness turns sharp or alters the way you move, end the session.

If soreness lingers through most of the week after nearly every session, the program is probably asking too much, too quickly. Planned recovery is part of the process, as our guide to making rest days part of your training explains.

Soreness or something more? Signs to take seriously

Typical soreness feels dull and tender, spreads through a muscle and improves steadily over a few days. According to HSS, red flags include pain that is significantly greater on one side of the body and soreness that lasts longer than three days. Pain centered in a joint rather than a muscle, a sudden sharp pain during exercise, or swelling and bruising also deserve a professional opinion.

Rarely, very hard exercise can trigger rhabdomyolysis, a serious form of muscle injury. Cleveland Clinic lists weak, tender and sore muscles along with dark pee that is brown, red or tea-colored as key signs, and notes that it can develop when people jump into an exercise program too fast. ACSM likewise advises seeing a doctor for debilitating pain, heavy swelling of a limb or dark urine. Because rhabdomyolysis can be life-threatening, get medical care right away if those signs appear.

Keeping muscle soreness modest as you progress

The surest way to limit soreness is to work with the repeated bout effect rather than against it. Introduce new exercises with lighter loads and fewer sets, then build over several sessions. Increase one variable at a time, such as weight, repetitions or total sets, instead of all three at once. Keep your training frequency steady, since long gaps between sessions make the next one more likely to leave you aching. Our guide to restarting your training after a break outlines a gradual ramp-up for exactly that situation.

Sleep, a balanced diet with enough protein and regular easy movement all support recovery. None of them will erase soreness after a big jump in training, but together they help you bounce back and keep showing up, which matters far more than how sore you feel the next morning.

If you manage a heart, kidney or metabolic condition, are pregnant, or are recovering from surgery or injury, ask your doctor how to pace training and recovery, and report unusual pain or new symptoms promptly.