BACK IN ACTION
Ric Flair is gearing up for his in-ring return ahead of his final wrestling match this summer ... and if you think the WWE legend isn't bustin' his ass in the gym, check out the clip "Nature Boy" just posted.
Naitch shared video of him getting some work in on the rowing machine and the air bike ... in addition to mixing it up with the battle ropes.
"Success Is The Sum Of Small Efforts Repeated Day In And Day Out! WOOOOO!" Flair captioned the workout video.