MO only once a week

I'm 24 and have self stimulated myself over the course of about 10 years. In the recent past I kept trying to only do it one time a week. Lately that's been really tough. I have Duchenne Muscular Dystrophy, a progressive muscle weakening condition. You would think because of how this stimulation makes me worn out and feel dumb I would have more motivation to stop. I can't run or work out so it's difficult for me to suppress urges. Not quite sure how challenges on here work? Any input would be great though. Perhaps people are in my same boat?