I use extreme poles and brushes, that's it!
This year I got diagnosed with Coeliac disease, which means my body doesn't absorb my food properly (so I am quite slim). Apparently i've had it all my life! (which explains why i've never been able to put on weight).
Since then, I have put on some weight but, for me, the extreme poles have literally been a life line.
Find someone local to you and try one out, then you can make your own decision.