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A photo posted by Ciara (@ciara) on

Getting fit for summer means never skipping an arm and back day.

Ever wonder how Ciara sculpted her incredible arms or how Khloe Kardashian maintains that killer booty? His name is Gunnar Peterson and his workouts mean business.

The man is a wizard when it comes to getting stars ready for movie sets and cover shoots, so it's a no-brainer as to why you'd want his advice, too. No doubt his methods could whip your soon-to-be summer bod into shape, so keep scrolling for three core arm and back-targeting exercises you can pull off at the gym. 

You might want to bookmark this page.

Biceps: Biceps Curl With Lunge

ESC: Gunnar Peterson

Kailey Strachan for E!

Targets: "Biceps on the upper arm and glutes."

Reps: "Between 8-20, per side, depending on the weight you have available and your current level of fitness."

Results: "A more fully-developed and balanced upper arm, a more impressive ‘show me your muscle' pose and more shapely glutes."

Chest: Push Up T-Raise

ESC: Gunnar Peterson

Kailey Strachan for E!

Targets: "Your pecs, your triceps, your rear shoulder head and your core. Sorry, no glutes."

Reps: "10-16 TOTAL. 16 so you're balanced, otherwise I'd leave it at 15."

Results: "Improved core stability, triceps with less droop, pecs that pop and friends who are impressed with your newly developed ability."

Back: Squat Row

ESC: Gunnar Peterson

Kailey Strachan for E!

Targets: "Muscles of the upper back and of course, glutes."

Reps: "8-12, per side, depending on the weight you have available and your current level of fitness."

Results: "Improved posture, improved topography in the musculature of your upper back and better glute development."