my physical body is strong, lean, and healthy
my body weighs (??)
I plan tennis every day

and similar...

Do not mention fat or overweight at all.

And also, visualize yourself at the perfect weight as you say these aloud.

Its also a great idea to look into diet and health and make some healthy adjustments. EG, give up soda and anything containing fructose corn syrup, and reduce carbos, etc.

robert