I'll confess that I'm borderline addicted to Fitness Dash -- but I have a major complaint about the game. When playing Endless Fitness mode, after I hit a certain score (I haven't logged what that score is, but it's beyond the point that I've done all the upgrades), the game starts to become slow and slightly unresponsive. It's still playable -- but annoying. You try to drag one of the customers to a machine or shower, and it doesn't register. You try to stack up moves, and some don't register. It just throws off my game.
 
Hopefully the makers of the game can come up with a fix for this.

I have to say I've not gotten this far in the endless mode, but Doggie Dash used to do something like this. I don't know what it is, it's maybe got something to do with the game being played so long, but it's very frustrating. I know I would've gotten a well better score on Doggie Dash had it not been for this glitch. You could always try e-mailing PF support and seeing if they have any fixes for this. Debz :)