It was blood, sweat and iced coffee for Ronda Ronda on the set of "Blindspot" ... where the UFC legend was decked out in an orange prison jumpsuit for her guest role on the show.
As we previously reported, Rousey is playing a violent gun-running felon on the NBC show (which airs in May) -- and judging by the blood spot on her jumpsuit, we're guessing the beats the hell outta someone.
The good news ... Rousey was smiling and appeared to be great spirits on the set.
Soooo ... back to her old self?