does anyone have tips on doing the plank/bridge?
i read alot to "brace your abs" what exactly is bracing your abs? do you flex them, suck them in or what? Also any tips on how to keep a straight line from head to heel??
i read alot to "brace your abs" what exactly is bracing your abs? do you flex them, suck them in or what? Also any tips on how to keep a straight line from head to heel??