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For most of us, temptations are everywhere, from the dessert buffet to the online shoe boutique. But a new study suggests that exercise might be a simple if unexpected way to increase our willpower and perhaps help us to avoid making impulsive choices that we will later regret.
Self-control is one of those concepts that we all recognize and applaud but do not necessarily practice. It requires forgoing things that entice us, which, let’s face it, is not fun. On the other hand, lack of self-control can be consequential for health and well-being, often contributing to problems like weight gain, depression or money woes.
Given these impacts, scientists and therapists have been interested in finding ways to increase people’s self-restraint. Various types of behavioral therapies and counseling have shown promise. But such techniques typically require professional assistance and have for the most part been used to treat people with abnormally high levels of impulsiveness.
There have been few scientifically validated options available to help those of us who might want to be just a little better at resisting our more devilish urges.
So for the new study, which was published recently in Behavior Modification, a group of researchers at the University of Kansas in Lawrence began wondering about exercise.
Exercise is known to have considerable psychological effects. It can raise moods, for example, and expand people’s sense of what they are capable of doing. So perhaps, the researchers speculated, exercise might alter how well people can control their impulses.
To find out, the scientists decided first to mount a tiny pilot study, involving only four men and women.
These volunteers, who had been sedentary and overweight, were told they would be taking part in an exercise program to get them ready to complete a 5K race, and that the study would examine some of the effects of the training, including psychological impacts.
The volunteers began by completing a number of questionnaires, including one that quantified their “delay discounting,” a measure that psychologists use to assess someone’s ability to put off pleasures now for greater enjoyments in the future. It tests, for instance, whether a person would choose to accept $5 today or $15 a week from now.
The delay-discounting questionnaire is generally accepted in research circles as a valid measure of someone’s self-control.
The volunteers then undertook a two-month walking and jogging regimen, meeting three times a week for 45 minutes with the researchers, who coached them through the sessions, urging them to maintain a pace that felt difficult but sustainable. Each week the men and women also repeated the questionnaires.
Finally, a month after the formal training had ended, the volunteers returned to the university for one more round of testing. (Later, two of them also ran 5K races.)