title: Preinjury and postinjury running analysis along with measurements of strength and tendon length in a patient with a surgically repaired Achilles tendon rupture.
abstract: METHODS
  Case report.
  
  
  BACKGROUND
  The Achilles tendon is the most frequently ruptured tendon, and the incidence of Achilles tendon rupture has increased in the last decade. The rupture generally occurs without any preceding warning signs, and therefore preinjury data are seldom available. This case represents a unique opportunity to compare preinjury running mechanics with postinjury evaluation in a patient with an Achilles tendon rupture.
  
  
  METHODS
  A 23-year-old female sustained a right complete Achilles tendon rupture while playing soccer. Running mechanics data were collected preinjury, as she was a healthy participant in a study on running analysis. In addition, patient-reported symptoms, physical activity level, strength, ankle range of motion, heel-rise ability, Achilles tendon length, and running kinetics were evaluated 1 year after surgical repair.
  
  
  RESULTS
  During running, greater ankle dorsiflexion and eversion and rearfoot abduction were noted on the involved side postinjury when compared to preinjury data. In addition, postinjury, the magnitude of all kinetics data was lower on the involved limb when compared to the uninvolved limb. The involved side displayed differences in strength, ankle range of motion, heel rise, and tendon length when compared to the uninvolved side 1 year after injury.
  
  
  CONCLUSIONS
  Despite a return to normal running routine and reports of only minor limitations with running, considerable changes were noted in running biomechanics 1 year after injury. Calf muscle weakness and Achilles tendon elongation were also found when comparing the involved and uninvolved sides.
authors.affiliation: University of the Sciences, Philadelphia, PA, USA. k.silbernagel@usciences.edu
authors.forename: Karin Grävare
authors.initials: KG
authors.lastname: Silbernagel
authors.forename: Richard
authors.initials: R
authors.lastname: Willy
authors.forename: Irene
authors.initials: I
authors.lastname: Davis
mesh_terms: D000125:Achilles Tendon / Q000033:anatomy & histology / Q000293:injuries* / Q000601:surgery; D001265:Athletic Injuries / Q000453:epidemiology / Q000209:etiology* / Q000534:rehabilitation; D001696:Biomechanical Phenomena; D005080:Exercise Test; D005260:Female; D006801:Humans; D011184:Postoperative Period; D012420:Running / Q000293:injuries* / Q000502:physiology; D012421:Rupture; D011795:Surveys and Questionnaires; D013997:Time Factors; D014481:United States / Q000453:epidemiology; D055815:Young Adult