You can use the Amazon Basics High-Density Foam roller for this exercise. The muscle being activated in this exercise is the serratus anterior which is involved in the performance of many overhead movements such as throwing a baseball or pressing a barbell overhead.
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The muscle assists with rotating the scapula upwards and tilting it backwards which is important for optimal overhead function. It also protracts the scapula during arm function and therefore is commonly known as the “boxer’s muscle”. If you'd like to purchase a roller for yourself, you can head over here. As an Amazon Associate, Rehabilitation Health earns from qualifying Amazon purchases.