Inclusion Criteria:  acute closed single-legged complete Achilles tendon rupture . age of 18 to 60 years.  Exclusion Criteria:  patients with prior Achilles tendon rupture or other situations that affected their lower limb functions or tendon healing (e.g., autoimmune disease, diabetes mellitus, systemic corticosteroid treatment). an inability to complete our suture technique (e.g., the distance from the rupture site to the Achilles tendon insertion was less than 3.5 cm) . those without rehabilitation or follow-up outcomes.