Final answer:
Weight loss is most effectively achieved through a combination of exercise and a low-calorie, low-fat diet. Vegetables are particularly beneficial for weight loss. Exercise increases the metabolic rate, which contributes to calorie burn, but should ideally be paired with dietary adjustments to optimize results.
Step-by-step explanation:
The statement that body weight is lost fastest when using exercise and a low-fat weight loss plan can be characterized as generally true, but the effectiveness of such approaches can vary from person to person. When it comes to choosing which type of food will help the most with weight loss, the options provided are fats, vegetables, lean meats, and fruits. Among these, vegetables are most likely to be helpful in weight loss as they are low in calories, high in fiber, and have a high water content, which can help you feel full. It's important to note that successful weight loss typically involves a combination of dietary changes and increased physical activity. Exercise alone may not be sufficient for substantial weight loss if not accompanied by dietary adjustments, given that a single cup of yogurt may contain more calories than one might burn through a moderate amount of exercise.
From the given information, most members of the National Weight Control Registry (NWCR) have achieved successful weight loss by adhering to a low-calorie, low-fat diet and doing high levels of physical activity. Exercise contributes to weight loss by raising the metabolic rate even at rest, and because the body's efficiency in converting internal energy to work is low, the energy expenditure during exercise can lead to significant calorie burn. However, exercise needs to be complemented by proper dieting, as protracted dieting alone can reduce the basal metabolic rate (BMR), making further weight loss difficult.