Sore muscles after exercise typically peak 24 to 72 hours after a workout and resolve on their own within a few days. The fastest way to feel better is a combination of light movement, adequate protein, good hydration, and strategic use of heat or cold. But understanding why muscles get sore in the first place helps you choose the right approach and avoid mistakes that can actually slow your recovery.
Why Your Muscles Get Sore
The soreness you feel a day or two after a tough workout is called delayed onset muscle soreness, or DOMS. It’s most common after movements that lengthen your muscles under load, like lowering a heavy weight, running downhill, or doing exercises your body isn’t used to. For years, the standard explanation was that tiny tears in muscle fibers trigger inflammation, and that inflammation causes the pain. The real picture is more nuanced.
Research published in the Journal of Applied Physiology found that DOMS can occur without any visible damage to muscle fibers or signs of classic inflammation inside the muscle itself. The soreness appears to originate more from irritation in the connective tissue surrounding your muscle fibers, not the fibers themselves. Chemical signals released during this process stimulate pain receptors in the muscle, making the area tender to touch and painful during movement. Two specific pathways involving nerve growth factors and pain-signaling enzymes drive this heightened sensitivity.
This matters because it changes how you should think about recovery. You’re not nursing a wound that needs to be left alone. You’re dealing with a temporary increase in nerve sensitivity that responds well to movement, blood flow, and the right nutrition.
Move Lightly on Rest Days
The single most effective thing you can do for sore muscles is keep moving. Active recovery, meaning low-intensity exercise like walking, easy cycling, or swimming, increases blood flow to your muscles. That extra circulation flushes out the chemical byproducts of hard exercise and helps return your muscles to their normal state faster than sitting on the couch.
The key is keeping the intensity genuinely low. A 20- to 30-minute walk, a gentle yoga session, or an easy spin on a bike all qualify. You’re not trying to get another workout in. You’re trying to get blood moving through sore tissue without creating more stress. If the activity itself hurts or leaves you more sore than when you started, you’ve gone too hard.
Use Heat and Cold at the Right Time
Both heat and cold can help sore muscles, but they work differently and the timing matters. According to Johns Hopkins Medicine, heat should not be applied in the first 48 hours after an injury or an extremely intense workout that may have caused acute muscle strain. During that early window, cold therapy (an ice pack wrapped in a towel for 15 to 20 minutes) can help reduce swelling and numb acute pain.
After those first 48 hours, heat becomes the better option for general soreness. A warm bath, heating pad, or hot shower increases blood flow, which helps clear the chemical buildup that contributes to that achy feeling. For routine post-workout soreness (not a sharp or sudden injury), many people find heat helpful from the start. A warm bath with Epsom salts is a classic recovery tool for a reason: the heat relaxes tight muscles, and the warm water feels good on tender tissue.
Foam Rolling Reduces Pain Over Days
Foam rolling has solid evidence behind it for reducing soreness. A 2024 meta-analysis found that foam rolling before or after exercise significantly reduced pain scores at every time point measured: immediately after rolling, at 24 hours, 48 hours, and 72 hours. The effect actually grew stronger over time, with the largest pain reduction seen at the 48-hour mark, right when DOMS typically peaks.
Spend about 60 to 90 seconds rolling each sore muscle group, applying moderate pressure. It should feel like a “good hurt,” not sharp pain. Rolling your quads, hamstrings, calves, and upper back after a hard session can meaningfully take the edge off the soreness you’d otherwise feel the next couple of days. You can also roll sore muscles the day after a workout to get some relief.
Eat Enough Protein for Repair
Your muscles need protein to repair and rebuild after exercise, and most people who work out regularly don’t eat enough of it. Mayo Clinic recommends 1.1 to 1.5 grams of protein per kilogram of body weight per day for people who exercise regularly, and 1.2 to 1.7 grams per kilogram for those doing serious weight training or endurance events. For a 150-pound person, that translates to roughly 75 to 115 grams of protein daily, depending on training intensity.
Spreading your protein across meals matters more than loading up at dinner. Aim for 20 to 40 grams per meal, and consider a protein-rich snack after your workout. Good sources include chicken, fish, eggs, Greek yogurt, cottage cheese, beans, and protein supplements if whole foods aren’t convenient. Consistently falling short on protein won’t just make you sorer for longer. It will slow the muscle-building process that makes future workouts easier.
Stay Hydrated and Watch Your Electrolytes
Dehydration makes muscle soreness worse and increases the risk of cramping. Water alone is important, but electrolytes play specific roles in muscle function. Sodium controls fluid levels and supports muscle contraction. Potassium supports muscle and nerve signaling. Magnesium helps muscles relax after contraction. When any of these are low, you’re more likely to experience cramps, spasms, and lingering weakness on top of your normal soreness.
You don’t necessarily need a sports drink. Most people can get adequate electrolytes from food: bananas and potatoes for potassium, nuts and leafy greens for magnesium, and a normal amount of salt in your diet for sodium. If you sweat heavily during workouts or exercise in hot conditions, an electrolyte drink or tablet can help replace what you lose.
Tart Cherry Juice as a Natural Option
Tart cherry juice is one of the few natural remedies with consistent clinical evidence for reducing muscle soreness. The effect comes from concentrated plant compounds that have natural anti-inflammatory properties. Multiple studies have tested the same general approach: drinking the equivalent of about 50 to 60 tart cherries per serving, twice a day, for several days before and after intense exercise.
In one study, runners who drank tart cherry juice for a week before a marathon and two days after reported significantly less pain than those who drank a placebo. The typical protocol in research uses 8 to 12 ounces of tart cherry juice (or a concentrate mixed with water) twice daily. You can find bottled tart cherry juice or concentrated versions at most grocery stores. It’s not a miracle cure, but it’s a simple addition that can take the edge off.
Be Careful With Anti-Inflammatory Painkillers
Reaching for ibuprofen after a hard workout is tempting, and it will reduce pain in the short term. But if you’re exercising to build muscle or get stronger, regular use of anti-inflammatory drugs can work against you. A study from Karolinska Institutet found that healthy young adults who took a standard daily dose of ibuprofen (1,200 mg) for eight weeks while weight training gained only half the muscle volume compared to a group taking a low dose of aspirin. Muscle strength was also impaired, though to a lesser degree.
The reason ties back to the biology of soreness. The inflammatory process that makes your muscles ache is also part of the signaling that tells your body to build new muscle tissue. Blocking that process with anti-inflammatory drugs dampens the signal. This doesn’t mean you should never take ibuprofen for severe soreness, but using it routinely after every workout is counterproductive if your goal is getting stronger or building muscle. For mild to moderate soreness, the other strategies in this article are better first-line options.
When Soreness Signals Something Serious
Normal DOMS is uncomfortable but manageable. It gets better with gentle movement, and the pain is spread across the muscles you worked. There’s a rare but serious condition called rhabdomyolysis where muscle tissue breaks down rapidly and releases its contents into the bloodstream, potentially damaging the kidneys.
The warning signs that separate rhabdomyolysis from ordinary soreness are distinct. Watch for dark urine that looks like tea or cola, severe pain that doesn’t improve or gets worse after 72 hours, significant swelling in the affected muscles, or unusual weakness where a limb feels genuinely nonfunctional rather than just stiff. The only definitive test is a blood draw measuring a specific muscle protein, but the urine color is the most visible early red flag. Rhabdomyolysis is most likely after extreme workouts you’re not conditioned for, prolonged exercise in extreme heat, or a dramatic jump in training intensity. If your urine turns dark after a hard workout, that warrants urgent medical attention.
Preventing Soreness in the First Place
You can’t eliminate DOMS entirely, especially when you try new exercises or increase intensity. But you can reduce its severity. The most effective prevention strategy is progressive overload: increasing your training volume and intensity gradually rather than making big jumps. Your muscles adapt to repeated exposure, which is why the same workout that left you barely able to walk the first time feels routine after a few weeks.
Warming up before exercise with five to ten minutes of light aerobic activity prepares your muscles for harder work and may reduce the degree of connective tissue irritation that causes soreness. Cooling down with light movement after a hard session also helps by maintaining blood flow during the period when your muscles are beginning their recovery process. Combined with consistent protein intake, adequate hydration, and smart use of rest days, these habits keep soreness at a level that signals productive training rather than one that sidelines you.