Quotes from the news wire:
Broadly, reality not meeting expectations is what trips people up, the most common example is when people have unrealistic notions of what the weight loss journey will be -- that they'll lose the same amount( of weight) every single week, or eat perfectly every single day. Life gets in the way. Teaching people a different mindset around that and being aware of your thinking style is key. ' All or none' is not good for weight, relationships or work performance.
The other thing is to not be so myopically focused on the scale, it's a piece of metal that gives you a number and is fraught with disappointment. It's not a good measure in the short term. It's better over the long term. Non-scale victories like looking better, feeling better, fitting into a smaller jean size.