I really have to disagree with this statement.
Because of the specificity principle, there is simply no weight lifting that will target your kicking muscles as well as KICKING.
Kicking is a complex movement. Any weight training is only going to target one portion of that movement — and imperfectly, at that.
Wearing ankle/shin weights has to be done with extreme caution to prevent damaging muscles/joints.
One interesting way to train with resistance safely is to kick under water.
I think the best way to train hard kicking is with a heavy bag or with a partner holding a body shield.