Don't focus too much on the number the scale displays; instead, pay attention to how your clothing are fitting.
Remember that gaining muscle won't result in a smaller number on the scale, and that's okay.
Yeomans underlines the need of not limiting one's attention to either weight growth or decrease. Weight changes are normal if you exercise regularly and eat well.
If you're doing everything properly and yet not losing weight, it might be because you're putting on muscle.
Therefore, it is important to measure your body fat percentage and muscle mass to get a full picture of how your body is changing as a result of your exercise efforts.
Yeomans, "weight loss is largely down to 80% diet and 20% exercise..." Many people have trouble losing weight, and it's usually because they don't try consistently enough.