49ers training camp: Brock Purdy added pounds and zip in the offseason
Briefly

Purdy trained in Jacksonville, focusing on utilizing his hips more than quadriceps when throwing, improving shoulder-to-lower body rotation, and increasing throwing velocity by nearly 5 mph.
Training involved a 3D motion-capture camera to refine mechanics, resulting in improved throwing velocity and precision on the field.
Purdy added 2 pounds of 'good weight' to his frame without sacrificing mobility, emphasizing the importance of maintaining agility while enhancing physicality.
Read at www.nytimes.com
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