Brace

Brace is used to help you balance.  You will need a larger size breed dog for this task and one that is structurally sound.

Train a stand stay.  First the stand.  Lure your dog into a stand and tell him to stay.  Treating him every time he stands.  Now gently put your hands on his shoulders and apply a slight amount of pressure.  If you dog moves, try it again with less pressure.