Achilles tendon (AT) injuries are rising in elderly people, causing long-term health issues. Healthy in vivo stresses and muscle-tendon interactions are needed to understand AT injury etiology and recovery. 107 studies measured AT stresses in adults over 18 during functional activities. Peak strains vary by location, method, protocol, and individual characteristics. This survey covers AT strain patterns and emphasizes the need for uniform nomenclature and AT structural comprehension.

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