Charles Barkley has some self-inspired advice for Joel Embiid: Get in shape.

And, true to form, he put it in somewhat crude terms. On ESPN’s “Get Up” Tuesday morning, Barkley said Embiid needs to get his “fat butt” in shape.

Embiid has faced criticism for his weight before — Andre Drummond called him “fat” and “out of shape” last November — and the Sixers would probably be happy if Embiid worked on his body a little, especially given his injury history. That said, there are kinder ways to put it.

Barkley said being called fat early in his career was a positive for him, when Moses Malone calling him fat and lazy led to weight loss. But the climate has changed since he was a young player.

“I wonder in Philadelphia who has the courage and the chutzpah to tell Joel Embiid, ‘Yo, man, you got to get in shape,'” Barkley said.

The panel then bridged the discussion to Zion Williamson, about whom Barkley had the same concerns. Albeit, in less blunt terms.

“I think he’s got a great system down in New Orleans,” Barkley said. “I love David Griffin and Alvin Gentry, but they’re gonna have to come up with a comprehensive plan to see what the perfect playing weight (is). I hear he weighs 280. You can’t play at 280 in the NBA. You can’t play at that weight. It’s too much stress on his knees.”

Embiid’s numbers suffered a drop in the postseason, for which his conditioning could be at fault. He did still average 20 points and 10 rebounds as the Sixers were a couple bounces away from the Eastern Conference Finals.

As for Williamson, he suffered a knee injury in his first game of Summer League, though it didn’t seem serious.