Slow and steady is the key to long-term weight loss. If you can make small, sustainable changes, then your body will get used to it.
Once your body is used to it, then make more small changes, but if your body doesn't have time to get used to the changes, then it'll eventually revert to what it sees as the norm.
It's common sense really, but there was a really good article about the science behind it the other day ...
Thousands of genes that have an influence on weight, say experts - which means weight loss isn't a level playing field
www.bbc.co.uk
Apologies if this is preaching to the converted.