i'm sorry to sound rude, but you can't bind someones weight. Binding is for psychic attacks and negative emotions. You can bind their lack of will-power, not their physical body. If that was the case, it wouldn't have taken me two years to lose all the weight that I did.
Three Steps Forward spell
to be rid of lack of motivation
You will need:
Small Piece of Paper
Red Ink Pen or Feather Pen with Dragons Blood Ink
On the small piece of paper write down the word "Motivation" in the red ink. Fold the paper up somewhat small, but big enough to hold it in the flame without burning yourself. Light the candle visualizing a spark of energy as the flame rises. Put the paper in the fire and watch it burn while sayingl:
(name), Dissipate the
Lack of energy
Try to breathe in the smoke..but not too much. Lay the paper down in a fireproof dish until its ash. close your eyes, and take in the energy. Repeat the spell until you feel you've raised enough energy. Let the candle burn and pour the ashes onto the Earth. You can either extinguish the flame and light it again whenever you need an extra boost of motivation, or you can keep the flame burning to stimulate motivation for the entire time the flame is lit.