Why do you feel weak when your dehydrated?

When you're dehydrated, your body experiences a decrease in blood volume, leading to reduced circulation and oxygen delivery to your muscles and organs. This can result in fatigue and weakness as your body struggles to perform basic functions. Additionally, dehydration can impair electrolyte balance, disrupting muscle function and causing cramping or weakness. Overall, the combination of these effects contributes to the feeling of weakness when dehydrated.