Russell Westbrook wasted no time getting back to work after becoming a Laker -- the NBA superstar got in an intense workout in LA on Friday ... and he says he's feeling "great!!!"
32-year-old Brodie -- who grew up in SoCal -- has been touring his old stomping grounds after the news broke Thursday ... including a trip to The Nice Guy in WeHo with his buddy Kevin Hart.
But it was back to business on Friday ... with the 2017 MVP working up a shirtless sweat at a nearby training facility.