Muscles in the Human Body. Muscles are how we move and live. All movement in the body is controlled by muscles. Some muscles work without us thinking, like our heart beating, while other muscles are controlled by our thoughts and allow us to do stuff and move around.
Cramping and Breast Tenderness. Cramping is one of the most common symptoms a woman experiences before, during or after her menstrual cycle. Caffeine contributes to cramps because of its diuretic nature--it increases urine production and promotes dehydration. In addition, coffee contains oils that may inflame your intestines and cause cramping.
What caffeine does to your body and brain. Many of us depend on caffeine. Some of us can't even start our day without it. Whether you get your daily caffeine fix from coffee, tea, or a canned energy drink doesn't make much of a difference. It's still a stimulant with some positive and negative effects. For starters, caffeine makes most of us feel more alert and awake. But while it can keep us focused, too much can also backfire.