Effects of Exercise on Depression
Almost everyone has heard of the "fog of war," but the "fog of living" is depression. "Depression affects memory and effectiveness (not to mention the ability to get up, get dressed, and function)," Anderson says. "If you can control your physiology, you can relax, focus, and remember."
In a study reported in the Journal of Sports Medicine and Physical Fitness in 2001, 80 young male and female volunteers were tested for mood and then did aerobics for an hour. Of the 80, 52 were depressed before the exercise. That group was the most likely to benefit, reporting a reduction in anger, fatigue, and tension. They also felt more vigorous after the workout.
A well-known study was done at Duke University involving 150 people 50 or older who had been diagnosed with depression. They were divided into three groups and given either exercise as a treatment for four months, the antidepressant drug Zoloft, or a combination of the two.
At the end of the four months, all three groups felt better. But the researchers didn't leave it there. They checked again in six months, and the exercise group had relapsed at significantly lower rates than the Zoloft or combination groups. In fact, the scientists felt that giving the Zoloft along with the exercise undermined the effects of the exercise, saying the combination group might have preferred to feel they had worked for their improvement rather than having to take a pill.
This doesn't mean, the researcher said, that exercise is a cureall for every case of depression. Seeking out the study showed motivation, and motivation can be hard to come by when you're depressed.
Bipolar disorder also does not seem to respond as well to exercise. On the other hand, anxiety disorders sometimes respond even more quickly.
If You Want to Try Exercise as a Brain Trainer
Single bouts of exercise can reduce anxiety for several hours afterward, although there may be a lag time before the good feeling sets in if exercise is too intense (good news for those who find fanatical, prolonged, "check your pulse" exercise unappealing).