Lupita Nyong’o is making an impression on her fans after posting a behind-the-scenes video to show the world how she trained in the water while shooting Black Panther: Wakanda Forever. The 54-second clip shows the actress, who played as the “war dog” spy Nakia, swimming underwater while carrying dumbbells, which appear to be about 10 to 15 pounds. 

“Swimming down to Talokan was not as easy as it looked! Safely supervised by @XPTLife and #MarkRobertsFitness,” Nyong’o captioned her TikTok video.