Dehydration is one of the most common and overlooked triggers of muscle cramps. When your body loses more fluid than it takes in, the resulting electrolyte imbalance interferes with normal muscle function, leading to sudden, painful contractions that can stop you mid-stride. Dehydration disrupts the balance of electrolytes your muscles need to contract and relax properly. When fluid and mineral levels drop too low, nerves become overactive, triggering the involuntary muscle contractions known as cramps ...