Acute Achilles tendon ruptures can be a devastating injury with a prolonged recovery period (1). Following the UKSTAR trial, Achilles tendon ruptures are predominately treated with a functional rehabilitation bracing program (2). The aim of treatment is to avoid lengthening of the tendon, and hence the resultant loss of function. The Achilles tendon resting angle (ARTA) provides a simple assessment of tendon length that can be performed in the clinical setting (3). This study assesses the Achilles tendon resting angle over a 52-week period and the correlation with functional outcome. A total of 182 consecutive patients with an acute Achilles tendon rupture were treated with a 10-week functional rehabilitation regime. The relative Achilles tendon resting angle was recorded as the difference between the limbs at the time of injury, then once treatment commenced at 4-, 11-, 26- and 52-weeks post injury. Patients with a previous Achilles rupture of the contralateral leg were excluded. The functional outcome was assessed using the Achilles tendon rupture score at 26- and 52-weeks post injury.Background
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