Looks like she'd just taken the brace off for that training session. Makes sense. I know from experience how sweaty those things can get if you're exercising, and she's unlikely to be doing anything that'll do any harm to a wrist on an athletics track.
Best to forget about this 2014 season. I'm sure Laura will be ready in no time and it is good that she isn't rushing anything. Hope her and Vaidisova can dominate the ITF for a while; would be better than the WTA's current state.