"The couple that slays together�stays together! Working out is always better with a partner! #StayThePath," Underwood said in the photo's caption. The picture shows husband Mike Fisher not quite doing his part in the exercise routine, as he is slumped over his exercise bike. Perhaps this is only a short rest during an otherwise vigorous routine.

Underwood, on the other hand, is fresh-faced and gung-ho for her cycling, sporting some metal devil horns with her hand, which she alludes to with the "slay" comment.