@Background Pony #68EC  
the photo on the left is what we see.  
but the one on the right says why Dash is saying no.  
she’s secretly locked up in a belt.

i don’t get it. at all

This really does a good job illustrating just how wacky the Equestria Girl proportions are.

@Background Pony #2306  
She’s being denied “two” pleasures.
 
Also even with the chain removed, it would range from a uncomfortable Daily Life to dangerous, depending on the sport or physical activity. The belt could eat into her skin, or cause internal injuries, based on her movements, falls, contact injuries. She can’t play active Sports with the Belt on.
 
Although she could still fall in Daily Life, the momentum of those falls are small compared to possible Sports falls, she would need to be supervised by her dom as long as the chain is there, regardless of activity, a Chastity Belt in reality needs a lot of supervision, and breaks for basic hygiene, and to check for problems. Like all good sessions, respect your Partner(s), respect Safety, and respect the Safe Word (or signal).
 
I’m curious though, it looks like she can’t use some steep stairs; but stairs would be a safety hazard, if the chain is too short.

How is she supposed to do any sport involving running with her legs chained together?

Nice, I hope we see more

@RushCars24  
The backstory is implied because Fluttershy holds the key

_{OP, I am confused, but how this can be tagged as FlutterDash?}
 
Leavin’ the Dash on her Little Break!