New research demonstrates that simply reducing caloric intake is not enough to cause significant weight loss. This could be the result of a natural compensatory mechanism that reduces physical activity following a reduction in calories.
Diet and exercise must be combined to achieve weight loss goals, according to the study.
The research was conducted on 18 female rhesus macaque monkeys. They were fed high-calorie diet for several years, then given a 30 percent reduction in calories.
Not only did they lose no weight, but physical activity levels for the monkeys began to drop shortly after the reduced-calorie diet was introduced.
Another comparison group of three monkeys was trained to exercise for one hour daily on a treadmill. This group did lose weight.