Prayers or rituals for health/weight loss

If you're like me (probably not, I'm way more casual about my prayer than most recons), then you pray for just about everything. "Dear Lug, I swear to ****ing You if you don't stop giving me ideas for new knitting projects to start while I still have six to finish . . ."

Have you incorporated any specific prayers or offerings into your practices for weight loss or fitness? A lot of mine have been for courage and resolve, to be given the strength to earn the warrior's portion. Burn away my flesh, make me hard and hale. Then I drop into Welsh for a little bit.

Anyone else?