In order for Range Rover to extend the vehicle's already amazing off-road chops, it had to do something about the truck's biggest dynamic liability: weight.
This is because they rely on static models of weight loss rather than dynamic models that account for the way the body adjusts to reducing food intake by reducing energy expenditure.
Because this static weight-loss rule does not account for dynamic physiological adaptations that occur with decreased bodyweight, its widespread use at both the individual and population levels has led to drastically overestimated expectations for weight loss.