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Challenge yourself today by trying to move a bit faster or adding in another round.

Mirinda Carfrae  SELF Spring 2019 Fitness Challenge

Nadya Wasylko

If you’ve been three rounds up to this point, try doing four today.

We promise you’ll be feeling it tomorrow.

Don’t forget to kick things off with an easy warm-up, like thesethree dynamic stretches.

Day 18 Workout  SELF Spring Challenge

Morgan Johnson/Alexandra Genova

The Workout

Heres a detailed breakdown of the moves youll do.

Do each move below for 45 seconds, resting 15 seconds between moves.

At the end of each circuit, rest for 60 seconds.

updown lunge  SELF May 2019 Challenge

Alexandra Genova

Do the entire circuit 2-5 times, then try the EMOM (Every Minute on the Minute).

Do the entire circuit 2-5 times, then try the EMOM to finish.

If you have time left over, rest.

lateral raise with hold  SELF May 2019 Challenge

Alexandra Genova

At the top of the next minute, start again.

Repeat for 4 minutes.

Toe Touch Crunch

x 20 reps

Rainbow Plank

Top image: Photographer:Nadya Wasylko.

spiderman  SELF May 2019 Challenge

Alexandra Genova

Stylist:Yuiko Ikebata.

Hair:Jerome Cultera.

Makeup:Seong Hee.

reverse lunge  SELF May 2019 Challenge

Alexandra Genova

Prop Stylist:Alex Brannian.

AthleteMirinda Carfraewears swim cap, goggles, and trisuit all by TYR, similar styles attyr.com.

Workout images and gifs: Photographer:Alexandra Genova.

forearm plank hold  SELF May 2019 Challenge

Alexandra Genova/David Mitchell

Stylist:Yuiko Ikebata.

Hair:Jerome Cultera.

Makeup:Deanna Melluso.

Toe Touch Crunch

Alexandra Genova

All products featured on SELF are independently selected by our editors.

If you buy something through our retail links, we may earn an affiliate commission.

rainbow plank  SELF May 2019 Challenge

Alexandra Genova