This Jennifer Lopez-Approved Cardio Workout Is One of the Most-Intense Ways to Get Your Heart Pumping

On his Instagram, Rodriguez's shared a video of the duo sweating it out at an outdoor track doing some burpees, planks, jump-roping, and even barbell squats. The stairs, though, might have been the hardest part of all: According to one exercise physiologist and trainer, it's easily one of the most-intense forms of cardio around.

2018, here we come. @trufusion @niyamasol

A post shared by Alex Rodriguez (@arod) on Dec 31, 2017 at 4:16am PST

"It feels like it's more work because it is more work," fitness expert Pete McCall told Self. "On the way up, you're doing a lot more hip flexion and extension—your hip is going through a much greater range of motion [than with walking or running], so you're getting more work out of your hip extensor muscles."

So how do you go about getting a J.Lo-worthy workout? Based on this workout from McCall, simple is best: Just sprint to the top of the stairs for 6 to 10 seconds, walk or jog back down for 30 seconds, and repeat five times. When you're finished, rest for a couple minutes and repeat the entire process for two or three rounds, depending on how you feel, he said.

Oh, and don't forget to grunt through the tough parts (it scientifically helps your workout!) and listen to "Eye of the Tiger" in your earbuds (you know, for an added thematic effect).

J.Lo and A-Rod's push-up game will totally give you This Is Us vibes. Also, check out some wellness secrets from more of your favorite celebs.

This post was originally published on January 9, 2018; it was updated on July 24, 2018.