It just takes one big trip to the grocery store to realize how important arm strength is. And even if you regularly work out your arms , you might be missing one crucial muscle.

We often spend plenty of time working on the front of our arms with moves like bicep and hammer curls , but the back of the arms — comprised of your triceps — can get left out.

That's why Stephanie Mansour, one of the best-in-class trainers featured in the Start TODAY app , recommends one tricep exercise in particular for those who want to strengthen and tone their arms.

Trainer Tip of the Day: The Best Exercise for Toned Arms

When you want to target your arms, the top move that Mansour recommends is tricep kickbacks.

"I love tricep kickbacks because they really tighten and tone the backs of the arms

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