Mimi's run data is all available at the Suunto Movescount site:
http://www.movescount.com/members/member1320158-Mimi1usa
This is much better quality data than what Strava provides, so I'd suggest anyone who wants to check up on her runs should use the Suunto data, not Strava. Strava has a very annoying "feature" of automatically removing sections of a run where the runner is moving very slowly or stopped. The Suunto data doesn't appear to do this, so you can see her true runs, including all the stops.
The periodic pit-stops that "Mimi's Relay" has been recording are clearly visible in the Suunto data. For example, take a look at this run:
http://www.movescount.com/moves/move179338699
Check out the pace and HR graphs. Every 5km, pace drops to zero while HR drops from around 140 to 90-ish. These are clearly periodic rest breaks. I don't see anything suspicious about that.
If there's anything odd about the data, it's that the cadence numbers are very noisy. They are constantly bouncing around from 180+ down to the 110-120 range, which implies she's doing an alternating run-walk, but it changes dramatically every minute. Maybe she's alternating 1 minute running with 1 minute walking?