Your CNS can also lose its ability to forcefully move your muscles. This can lead to fatigue, which may cause shaking or twitching. Shaking can happen when you keep a muscle in one position for a long time. You may have experienced this while doing planks or a barre workout. This is due to the activity of motor units. Some motor units in your muscles are only used for powerful movements.
When you hold a muscle in place for a long time, these motor units are activated to provide more force. This can result in shaking. For example, during or after planks, your arms and core may shake. Your muscles use glucose for fuel. When you work out, your glucose levels can become depleted, especially if you exercise at a vigorous pace or for a long period of time.
This can lead to low blood sugar, also known as hypoglycemia. Staying hydrated is important for keeping your electrolyte levels balanced. Electrolytes control the function of your nerves and muscles. However, doing an intense activity can make you sweat a lot and lose water. The same goes if you exercise outdoors on a hot day. If you sweat too much and become dehydrated, you may experience muscle twitching and cramps. This can feel like shaking.
Other symptoms of dehydration can include:. Some people like to drink coffee, sports drinks , or pre-workout supplements before exercise. These beverages contain caffeine, which can help you power through your workout.
But if you consume too much, you may become jittery. Shaking due to caffeine most often affects your hands and limbs, but it can involve other body parts. A solid warm up and stretch session might also keep shaking at bay by helping to reduce muscle fatigue from the get-go A review of the acute effects of static and dynamic stretching on performance.
Behm, D. Europena Journal of Applied Physiology. But if the muscle starts to shake toward the beginning of the exercise, it may be more of a warning sign that the exercise is too difficult for the body to handle , so scaling back on the intensity or lightening up on the weights may be necessary. Generally, as muscles get stronger and become accustomed to an exercise, shaking will happen less , but everyone responds differently to exertion.
Malisoux, L. Functional adaptability of muscle fibers to long-term resistance exercise Shoep,e T. Medicine and Science in Sports Exercise. No matter how hard the exercise routine, be sure to maintain good nutrition and hydration to help counteract shaking due to factors like dehydration and electrolyte balance.
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Stretching after running is just as important as the run itself. Go Paperless with Digital. Loren G. Martin, professor of physiology at Oklahoma State University in Tulsa, responds: "Let's start by examining what happens when you exercise.
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