Remember when Jennifer Garner walked the Oscars red carpet [1] back in March and all anyone could do was stare at her arms? Well, we caught another glimpse of those sculpted masterpieces at the premiere of her new film Peppermint [2] on Aug. 28, and thanks to some peeks at her training, we're one step closer to achieving them on our own.

The 46-year-old actress recently shared clips on Instagram from her workout routine as she prepped to play a grieving mother turned badass assassin for the movie. Her hashtag sums it up perfectly: "She looks nice, but she's no joke." With trainer Simone De La Rue by her side, Jennifer gives this intense upper-body workout her all — just look at those perfect push-ups!

Check out more videos of her workout routine ahead, and let her (and her toned arms) inspire you.