Meditation seems to energize the sleep-deprived. It seems to help with concentration. It even seems to bolster the very structure of the brain as we age. Enthusiasts have long touted the health benefits of meditative practices such as chanting, yoga, and prayer. Now, using the latest high-tech tools of neuroscience and biochemistry, they are teasing out how those benefits work. And increasingly, they are focusing on how meditation may help not only the body but the brain. As time goes on, we're understanding this phenomenon in ever more advanced scientific terms," said Dr. Herbert Benson, president of the Mind/Body Medical Institute and a Harvard Medical School associate professor who has studied the body's "relaxation response" for nearly 40 years. "And why it's so important today is because over 60 percent of visits to the doctor are in the stress-related realm." While some of the most striking studies have involved monks who were experts at meditation, the new research also backs up claims that garden-variety meditation can bring scientifically demonstrable benefits. Serious research on meditation now includes hundreds of studies examining its possible ... benefits, from lifting depression to relieving pain to fighting flu. Benefits can come from a spectrum of repetitive, mind-clearing practices that elicit the so-called relaxation response -- from swaying in prayer to saying the rosary to knitting.