Overview

• Biel’s backless white Proenza Schouler dress clip from The Better Sister sparked widespread interest in her fitness after going viral on TikTok.
• She cautioned that achieving her on-screen “peak shape” demanded “the strictest and most rigid lifestyle” and cannot be maintained long term.
• In a TikTok video, she demonstrated exercises taught by pilates guru Ashley Brown, including Romanian deadlifts and hamstring curls to build muscle and flexibility.
• While traveling, Biel substitutes barbells with dumbbells and cables with resistance bands to keep her regimen consistent on the road.
• At 43, she is adjusting intensity to her body’s changing limits and urging followers to “let’s get older and stronger together.”