Foam roller

A foam roller is a lightweight, cylindrical tube of compressed foam.[1] It may be used for many reasons, including increasing flexibility, reducing soreness, and eliminating muscle knots.[2]

Foam roller
Exercises

Foam rolling is used in the alternative therapy of self-myofascial release[3] despite a lack of evidence for its effectiveness.[4]

Rollers come in different sizes and degrees of firmness. The firmness (often identified by the color) can range from soft to firm, soft being best for beginners.[2]

References

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