Research from the University of Essex, in England, suggests that viewing natural green images while exercising may be better than being exposed to other colors. The researchers tested 14 people doing moderate-intensity cycling while watching video footage of predominantly gray, red or green imagery. Each of the participants underwent three cycling tests—one with each of the videos—along with a battery of physiological and mood testing.
The researchers found that when the subjects watched the green-colored video, they had better moods, with a lower relative perception of exertion than when they exercised while watching the red and grey videos. They also found those that exercised while watching the red video experienced greater feelings of anger during their exercise.