For a smaller waist, try training the TVA muscles as well.

The Transverse Abdominus (TVA) is an abdominal muscle whose function is not to cause movement of the spine but instead used to keep the waist nicely tucked in, making the midsection appear smaller. We all know of people who are lean, but they have a pot belly that sticks out quite a bit. This is because they have weak TVA muscles.

Training the TVA is very easy. Simply blow all of your air out and suck your stomach in and hold it for 15-30 seconds. You can do this throughout the day by simply sucking your stomach in. That may seem rather simple, but it works for creating a slimmer waist line.

Because of the nature of this muscle, it can be trained every day at any time.
Three sets of 30- second contractions should get you started.

try it

I do these in work and even watching television.

Great post SubZero! I read about the same thing awhile back in my research. That stuff works like a charm, everybody should try it.

Good for doing in bed before you go to sleep cos you're lying down

Pilates works them a lot as well because it focuses on your core and breathing while you're doing the exercises