Walking as a way to lose weight: proven benefits without dieting

What are the benefits of walking as a non-dietary exercise method for weight loss?

In 1973, Dr. Grant Kunnapp of the University of California decided to conduct an experiment on 34 obese patients to demonstrate that weight loss could be achieved simply by consistently walking daily, without the need for dieting.

Initially, no weight loss was noticeable. As walking time gradually increased to more than half an hour daily, the participants noticed weight reduction. A year later, the 11 who persisted showed significant and maintained weight loss. The smallest weight loss was 10 pounds, the largest was 38 pounds, and the average weight loss was 22 pounds.

Other studies have reached similar conclusions.

In the United States, an 8-week walking program was developed for 11 women working at a university, aiming to have them burn 500 calories per day. After completing the program, although none of them fasted, each still lost an average of 5 pounds. Tests also revealed that they each lost an average of 12 pounds of fat, while gaining more than 6 pounds of muscle mass.

Researchers at Walden University also found that overweight middle-aged men who underwent 16 weeks of walking exercise experienced steady weight loss without needing to diet. The method involved walking 3 miles (approximately 5 kilometers) three times a week.

Researchers at Stanford University School of Medicine studied 45 people who exercised regularly and found that their average body fat percentage was 13%, the same as that of young people 25 years younger than them. This suggests that men who exercise regularly do not experience the typical weight gain with age.

Physical exercise is also an important measure for controlling weight in young people. Researchers recorded the eating habits of 28 pairs of overweight and normal-weight high school girls. They found that the overweight girls consumed an average of 2000 kcal per day, while the other group consumed 2700 kcal. Analysis of their physical activity revealed that the normal-weight group had twice as much physical activity and other physical activity time as the overweight group, concluding that the main cause of adolescent obesity is insufficient physical activity, not excessive food intake.

In Dr. Kunnapp's five-year walking exercise trial, only 11 of the 29 women persisted, while all five men gave up halfway. Five years later, the 11 women had all lost weight and maintained a normal weight.

Therefore, Mr. Peter Wood of Stanford University says, "If you enjoy exercise and stick to it, you will achieve weight loss. If you can maintain a reasonable amount of exercise (about four times a week, 40 minutes each time), then you don't have to worry about consuming a certain amount of calories."