This #FitIn4 total-body workout strengthens your arms, legs, and core in under five minutes. Who doesn't have time for that?

By Ashley Mateo
Updated: March 22, 2018

Think you're too busy to squeeze in a workout today? Think again. All you need is four minutes, and you can fire up every muscle on your body. We dare you to tell us you don't have four minutes! (Got a little more time? Try this 10-Minute Tighten-and-Tone Circuit from Shaun T.)

This #FitIn4 workout from Seattle-based trainer Kaisa Keranen is made up of four moves: one for your upper body, one for your lower body, one for your core, and one to bump your heart rate up. Each move should be done for 20 seconds with a 10 second break between moving to the next one. Try to complete two to four rounds.

Side-to-Side Push-up

A. Start at the top of a push-up position. Step right hand to the right side and lower down to a push-up.

B. Push up then move right hand back to center. Repeat on the opposite side. Continue alternating.

Single-Leg Star Squat

A. Cross left leg behind right and lower into a curtsy lunge.

B. Press through front heel to extend right leg as left leg extends out to side of hip (lift leg as high as possible with control). Return to starting position without touching left foot to the floor (if possible). Spend half the alloted time on the right leg, then repeat on the opposite side to complete the set.

Criss-Cross Squat Jump

A. Start in a sumo squat position. Drive off heels to jump up.

B. Land with one foot in front of the other, lowering back down in to your sumo squat.

C. Jump up again, landing with the opposite foot in front. Continue alternating.

Plank Opens

A. Start in an extended-arm plank position. Shift weight onto right arm and rotate to the left, lifting left arm to the sky.

B. Return to center, then repeat on the opposite side. Continue alternating.

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