Does Dehydration Cause Cramp?

Does dehydration cause cramp

Does dehydration cause cramp? Yes, dehydration can be a common cause of muscle cramps. When you become dehydrated, your body loses fluids and electrolytes, such as sodium, potassium, magnesium, and calcium. These minerals are necessary for proper muscle function. As a result, Cramp in the muscles occurs because of electrolyte imbalance.


However, it’s important to note that the exact causes of muscle cramps are still an area of ongoing research, and there may be additional factors involved.

What is dehydration?

Dehydration can occur when your body doesn’t have enough fluids. This happens because of:

  • Inadequate fluid intake.
  • Excessive sweating.
  • Prolonged physical activity.
  • Certain medical conditions.

When you’re dehydrated, your muscles may not receive the necessary electrolytes to function properly. As a result, this causes them to contract involuntarily and result in cramps.

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How do I prevent Cramp from dehydration?

To prevent muscle cramps caused by dehydration, make sure you drink enough fluids throughout the day. This is especially important during periods of physical activity in hot weather.

Additionally, consume food and/or drinks that contain electrolytes because these help replenish the essential minerals and help prevent cramping.

How much do I need to drink during exercise?

Ideally you need to replace what you lose. This varies depending on a number of factors such as body size, intensity of the exercise, ambient temperature, humidity, and your personal sweat rate. On average, a person loses approximately 0.5 to 1 liter of fluid per hour of intense running.

A great way of dertermining this is to weigh yourself before and after a run. The difference is the fluid you have lost.


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Other causes of Cramp

In addition to dehydration, other factors that are thought to cause muscle cramps include:

However, if you’re experiencing frequent or severe muscle cramps, it’s always a good idea to consult with a doctor or healthcare provider to rule out any underlying medical issues which cause Cramp.

What is the evidence for Cramp and dehydration?

The following scientific studies aim to answer the question does dehydration cause cramp?

This study explores the relationship between dehydration and muscle cramps. It found that dehydration increased the susceptibility to muscle cramps and that the reflex inhibition of cramping was impaired.

  • Schwellnus, M.P. “Cause of exercise-associated muscle cramps (EAMC)–altered neuromuscular control, dehydration or electrolyte depletion?” Br J Sports Med. 2009; 43(6): 401-8.

This review article examines various theories regarding the causes of exercise-associated muscle cramps (EAMC), including altered neuromuscular control, dehydration, and electrolyte depletion. It discusses the available evidence and proposes that EAMC is likely multi-factorial.

  • Miller, K.C., et al. “Independent and combined effects of dehydration and hyperthermia on cardiovascular responses to exercise.” Scand J Med Sci Sports. 2010; 20(1): 53-61.

This study investigates the independent and combined effects of dehydration and hyperthermia (elevated body temperature) on cardiovascular responses during exercise. It discusses the potential influence of these factors on muscle cramps.

These studies provide insights into the relationship between dehydration, electrolyte imbalances, and muscle cramps.

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