Here are some interesting tidbits I found out about coffee:
Caffeine from coffee will also fight muscle fatigue. So slurp up a cup of coffee before performing a demanding activity like running, weightlifting or before a long day in the garden, and watch your performance increase.
Evidence shows that caffeine intensifies muscle contractions, masks the discomfort of physical exertion and even speeds up the use of the muscles' short-term fuel stores.
Side Effects:
Overdoing it (4-5 coffees a day) can over-stimulate the nerves and generate some pretty nasty side effects. It can leave the drinker feeling restless, irritable, and make his hands tremble. In extreme cases, it can create severe insomnia.
Other side effects from excessive caffeine consumption are diarrhea, copious urination, while some people can even experience facial flushing. It's hard to say how much caffeine is needed to trigger these side effects because everybody's body will react differently.
Occasional drinkers might experience the side effects after one cup whereas usual drinkers might get jumpy when drinking one more than usual.
Caffeine creates a dependency, and its main problem is caffeine withdrawal. This means that if someone who usually drinks between one and three cups of coffee a day suddenly stops drinking it, that person could develop headaches.
Other major drawbacks of quitting the brew are anxiety, light depression and fatigue. Obviously these might seem like very severe side effects but only a minority of coffee drinkers will experience them