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But there may be a downside to this. Researchers suggest the amount of caffeine in just two cups of coffee can cut down the body's ability to increase blood flow to the heart during exercise.
Cardiologists are aware of this phenomenon, and the theory is that caffeine may block certain receptors in the walls of blood vessels interfering with the normal signaling processes that cause blood vessels to dilate in response to exercise.
If you enjoy a cup of coffee or two, you may want to reach for when you are cooling down. In fact, it's a good idea to limit all forms of stimulants around exercise time and stick with water, which we know is safe in all cases.