By peoplestaff225
January 15, 2015 12:27 PM

Zach Harrison Photography

As a former U.S. Marine, Erin Oprea is dedicated to fitness. Now a Nashville-based personal trainer with clients like Carrie Underwood, she uses her expertise to help those with busy lives stay fit. Visit her site or follow her on Twitter @erinoprea. Then come back to PEOPLE.com every Thursday to master a new workout move.

Some of my favorite ways to workout involve combining moves to create an exercise that does more than just one thing for your body. In that spirit, I developed the dog walking lunges.

This one move will not only keep your dog healthy and relieved but will also serve to keep you warm on chilly days—all while creating beautiful legs as a byproduct. Just make sure your dog isn’t tugging you all over the place first!

RELATED: Before Your Next Shopping Spree Master This Move from Celebrity Trainer Erin Oprea

Walking Lunges

Zach Harrison Photography

1. Every time you perform the lunge your torso should be upright, core engaged and your rear knee bent just above the ground.

2. Each time as you stand, drive through your front heel.

Zach Harrison Photography

3. Perform 10-50 lunges at a time depending on your level, walk a short bit and repeat for a total of 4-8 times.

Zach Harrison Photography

4. Try this every time you walk your dog and you will get stronger and better each time.

RELATED: Master this Move: Sumo Squat Side Hop from Celebrity Trainer Erin Oprea

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