Acute Achilles tendon rupture: Do cast boots produce adequate equinus when used for functional rehabilitation?

•15 patients with an acute Achilles tendon rupture randomised to a rigid boot and 14 to an equinus cast.•The mean Tibiotalar angle was 124° in the boot group and 136° in the cast group (p<0.001).•The mean Tibio-1st-metatarsal angle was 134° in the boot group and 147° in the cast group (p<0.001).•The mean posterior malleolus to calcaneal height was 25mm in the boot group and 15mm in the cast group (p<0.05).