There’s an interesting article on the newscientist.com site about benefits of meditation. This articles describes a research done on mediation and its effects on about 30 people. The research was led by Bruce O’Hara and his colleagues at the University of Kentucky in Lexington, US. The test showed that right after meditation people tend to have a quicker reaction than even people after sleep. Here’s a quote from the article:
Ten volunteers were tested before and after 40 minutes of either sleep, meditation, reading or light conversation, with all subjects trying all conditions. The 40-minute nap was known to improve performance (after an hour or so to recover from grogginess). But what astonished the researchers was that meditation was the only intervention that immediately led to superior performance, despite none of the volunteers being experienced at meditation.
Another research that they have conducted in Massachusetts General Hospital in Boston using MRI show that "…meditating actually increases the thickness of the cortex in areas involved in attention and sensory processing, such as the prefrontal cortex and the right anterior insula…".
So, don’t waste time and meditate more often.
Personally, I noted that I when I meditated for rest, I felt reenergised after just 15 minutes of meditation. I must confess, though, that I wish I’ve meditated more often.