User blog comment:IamJakuhoRaikoben/Chapter 471: Until the Battle is Done, Review./@comment-4449950-20160201214048/@comment-76.161.172.226-20160201220648

I don't know why people are surprised about Erza being up and about already. Yes, she had a hard battle against Ajeel, but it's not like she suffered grievous wounds in it. Remember the Edoras arc? She completely exhausted her magic (one of two times in the series that's happened to her), fell from a great height on a rock that hit with enough force to make a crater. She initially couldn't even move, but was fine in a few hours. Remember the GMG arc when she took on all 100 monsters? She was a mess at the end of that. Yet at the end of the day she was moving around fine with a few bandages, and within a day she's perfectly fine.

This is little different. She was a mess at the end of the fight with Ajeel, and now a day or two later, she's mostly better. If anything, it's taking her longer to recover from her fight with Ajeel, than it's taken her to recover from anything else in the series.