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You’re midway through a run, workout, or CrossFit session when suddenly it strikes—a debilitating muscle cramp that stops you cold. Nothing kills a workout quite like the pain and tightness a cramp brings on. And whether you’re lifting weights, running sprints, or doing laps in the pool, you can cramp up. “A cramp is when the muscle unit itself contracts and doesn’t have enough resources to release that contraction,” explains Jennifer J. Beck, M.D., an assistant professor of orthopedic surgery at UCLA’s Orthopedic Institute for Children. Muscle cramps typically strike whatever area you’re working the hardest. “Runners are likely to get lower-extremity cramps, while rowers and swimmers might be more prone to upper-extremity and chest-wall cramps,” Beck says.
It’s not just the movement that’s to blame. “The most common cause of muscle cramps tends to be something nutritional,” says Jordan D. Metzl, M.D., a sports medicine physician at the Hospital for Special Surgery in New York. That’s especially true for endurance athletes like distance runners, cyclists, and triathletes, who have lost high amounts of electrolytes through their sweat without replacing them. This can lead to a deficiency in sodium levels, which triggers cramps.
“In order to combat these deficiencies you need to make sure you’re being nutritionally smart,” says Metzl. That means getting enough electrolytes in your diet with salty foods like pretzels or taking salt tablets during workouts. In addition to sodium, the minerals potassium, magnesium, and calcium can help prevent your muscles from locking up. Aim to get these nutrients through foods first, advises Beck.
Key sources include bananas for potassium, leafy green vegetables for magnesium, and diary products like milk and yogurt for calcium. Proper hydration is also important, since dehydration causes an alteration in electrolyte concentration as well as a buildup of lactic acid from muscle metabolism, both of which can cause cramps. Individual needs vary—some people do fine with just a little water, others require more fluids or a sports drink with electrolytes. “Experiment to see what works best for you,” says Beck.
SEE ALSO: Stretches For Tight Hips
Cramping can also occur when your workouts get the best of you. “Functional cramps happen in people who overload their muscular capacity,” says Metzl. That can mean putting too much weight on the bar, maxing out on the number of reps you’re doing, or even putting your body in a position where flexibility is an issue.
To help keep muscles mobile, incorporate more flexibility in your training. It can also help to use a foam roller before a workout, adds Metzl. Sudden and intense movements, such as sprint intervals, may be another cramp trigger. That’s especially true if you haven’t properly warmed up, stretched, or prepared your body for action. “If you’re going to recruit all the energy required of your hamstrings and quad muscles to do something like sprint 400 meters but your muscles don’t have the energy or building blocks to do so, they will most likely cramp up,” explains Beck. Improving your flexibility can go a long way toward keeping your muscles limber and less likely to cramp.
“Tighter muscles have less change in length during normal function, known as excursion,” says Beck. “That means they have to do the same amount of work but with a shorter change in length.” Repeating this movement at a high rate or high volume can cause the muscle to cramp, since it’s not getting properly stretched during exercise, she notes. Stretching, as well as a proper warmup, is key to avoiding cramps mid-workout. Stretch the muscles you’ll be using the most—for runners, that might mean the hamstrings; for an upper-body strength day, stretch your chest, shoulders, and arms. If a cramp does strike while you’re exercising, stop and gently stretch the affected muscle. Don’t try to push through the cramp or do a big, dramatic stretch, warns Beck, since either can result in a muscle tear.
These chewable electrolytes come in two refreshing flavors, Tart Orange and Zesty Lemon-Lime, to help reduce muscle cramps and boost stamina. Each two-tablet serving has 100mg sodium, 30mg potassium, 10mg calcium, and 6mg magnesium. ($15, saltstick.com)
Lactic acid is the cause of that signature hobble after a tough leg day, but its buildup in your muscles can also cause cramps. These tablets help you recover quicker and reduce cramping by lowering lactic acid production by up to 26%. ($47, xendurance.com)
This 1.7-ounce sports shot operates off scientific research that shows your muscles cramp when motor neurons in your spinal cord start to fire spontaneously and repetitively. Hotshot boosts your neuromuscular performance and stops cramps, so you can train harder and longer. ($35 for pack of 6, teamhotshot.com)
100% Natural Pickle Juice Sport
It’s not the first food you think of when it comes to replacing lost electrolytes, but this juice has up to 10 times more electrolytes than the average sports drink. Plus, pickle brine is free of artificial additives, sugar, and caffeine so you won’t get an energy crash after taking it. ($20 for pack of 12, picklepower.com)