A well-lit, high-resolution close-up photograph of a muscular human arm demonstrating various weight training exercises targeting the biceps, triceps, and forearm. The subject is wearing a black compression sleeve and performing movements like bicep curls, tricep extensions, and wrist flexions. The lighting is soft and diffused, accentuating the definition of the muscles. The background is blurred to focus attention on the detailed, dynamic movement of the arm. The overall tone is educational, informative, and visually compelling, suitable for a physical therapy article.

A-well-lit-high-resolution-close-up-photograph-of-a-muscular-human-arm-demonstrating-various