In this flexibility workout, youll get a two-for-one burn with a mix of cardio and core work.

What makes this combo so great?

But really, your core is much more than that.

Woman performing a high plank in a flexibility workout.

Katie Thompson

And this grouping of moves in todays flexibility workout is going to tackle all of them.

We especially love the inchworm here, for itscoreandmobility benefits.

(Cant do a single-leg inchworm?

Squat to Obliques Twist

Feel free to make it bilateral instead.)

As for the squat to oblique twists and modified burpees?

Theyllreallyget your heart rate up, making this a great cardio and core combination.

Modified Burpee

Plus, the superman will help you work those all-important back muscles, which are key forpostureand efficient mobility.

Keep scrolling for the details on how to do todays cardio-core interval workout!

The workout below is for day 12 of theSELF New Years Challenge.

SingleLeg Inchworm

Check out the full four-week workout program righthere.

Or go to the workout calendarhere.

If youd like to sign up to receive daily emails for this challenge, you could do thathere.

Supermans

After your last circuit, try the bonus move for 60 seconds.

Hair, Avery Golson at See Management.

Makeup, Ayaka Nihei.

One Knee Posture Pull

OnNikki Pebbles(GIF 1): Sports Bra; Popflex.

Sneakers; Stella McCartney.

OnAlex Orr(GIF 5): Sports Bra and Leggings; Lululemon.

UpDown Planks