Simply, the production of the hormone melatonin (which is higher in the evening, to induce sleep, and lower in the morning when the light comes in), responds to the amount of light you receive through your eyes.
With the decrease of light in the winter, your body maintains a higher level of melatonin throughout the day, which is why many of us feel tired and get moody during winter days, our bodies think we should be sleeping!
Get out into the natural light as much as possible. On a sunny day, walk, take in the fresh air, and, leave your sunglasses off to get as much light through as possible.
Serotonin is another hormone produced by the body. Widely known as the feel-good hormone, or the body's self made tranquilizer. The more you can produce, the more you can relieve your symptoms of SAD.
Medical research has shown a rise in serotonin levels (by testing saliva) in individuals after Massage, therefore, lowering stress, and leaving you with that feel-good feeling!
So, inviting Massage into your office will not only rejuvenate and raise your staff morale. It will also be motivating to their work, and home environment.