I didn't realise how much my weight was an issue until a recent (last year now) trip to the fair

I struggled on to this roller coaster and sat down in the chair, and despite everything and all my effert, I couldn't get the bar to lower.

it was really embarrassing, especially when the ride attendant said to me you need to get off, all the other people are safely in their seats and are ready to go.

I don't think you realise how much an issue it is until you actually are prevented from doing something you want to do.

I'm telling this story because I'm wondering if their is something you currently want to do but can't, so maybe wanting to do it (and to acheeve it) will motivate you.