India, Nov. 24 -- Jessica Biel has finally lifted the curtain on the fitness routine behind her toned arms, strong back, and on-screen confidence. The actress posted a detailed workout video on Instagram, calling it "the arm and back workout everyone asked for." Wearing sleek black gym wear, she moved through different exercises along with her trainer, Ben Bruno.

In her caption, Jessica thanked her trainer for helping her stay fit both for her Netflix series The Better Sister and for everyday life. "Thank you to my friend and amazing trainer @benbrunotraining. you can get his app to do these workouts too!" she wrote.

The video shows Jessica performing a mix of strength moves using resistance bands, dumbbells, gymnastic rings, and a work...