Advertisement

Sports Medicine

, Volume 44, Issue 12, pp 1777–1778 | Cite as

Author’s Reply to Liu et al.: “Important Issues Concerning Use of the Term ‘Copers’ in Chronic Ankle Instability Research”

  • Erik A. WikstromEmail author
  • Cathleen N. Brown
Letter to the Editor
  • 195 Downloads

We want to thank Liu and colleagues [1] for taking the time to continue the discussion around terminology and definitions for this unique population of individuals who have sprained their ankle but fail to develop the signs and symptoms associated with chronic ankle instability (CAI). The initial recommendation to use the term ‘coper’ was based in large part on our purpose: identifying trends in the literature to make recommendations that could help reduce between-study variability when examining this unique patient population, much like Delahunt et al. [2] did for those with CAI. Approximately 71 % (15/21) of published reports at the time our review was conducted used the term ‘coper’, while two additional studies used ‘ankle sprain copers’. Since then, three additional papers have been published in this area and all include the term ‘coper’ in some fashion (ankle sprain copers [3, 4], coper [5]). Currently, therefore, 83 % of the current literature includes the term ‘coper’ in some...

Keywords

Injury Risk Ankle Sprain Lateral Ankle Ankle Injury Organismic Constraint 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The authors have no competing interests to declare.

References

  1. 1.
    Liu W, Jain TK, Santos M, et al. Important issues concerning use of the term ‘copers’ in chronic ankle instability research. Sports Med. doi: 10.1007/s40279-014-0279-2
  2. 2.
    Delahunt E, Coughlin GF, Caulfield B, et al. Inclusion criteria when investigating insufficiencies in chronic ankle instability. Med Sci Sports Exerc. 2010;42(11):2106–21.PubMedCrossRefGoogle Scholar
  3. 3.
    Golditz T, Steib S, Pfeifer K, et al. Functional ankle instability as a risk factor for osteoarthritis: using T2-mapping to analyze early cartilage degeneration in the ankle joint of young athletes. Osteoarthritis Cartilage. 2014;22(10):1377–85.PubMedCrossRefGoogle Scholar
  4. 4.
    Steib S, Hentschke C, Welsch G, et al. Effects of fatiguing treadmill running on sensorimotor control in athletes with and without functional ankle instability. Clin Biomech. 2013;28(7):790–5.CrossRefGoogle Scholar
  5. 5.
    Needle AR, Swanik CB, Schubert M, et al. Decoupling of laxity and corticol activation in functional unstable ankle during joint loading. Eur J Appl Phys. 2014;114(10):2129–38.CrossRefGoogle Scholar
  6. 6.
    Gribble PA, Delahunt E, Bleakley CM, et al. Selection criteria for patients with chronic ankle instability in controlled research: a position statement of the international ankle consortium. J Orthop Sports Phys Ther. 2013;43(8):585–91.PubMedCrossRefGoogle Scholar
  7. 7.
    Hertel J. Sensorimotor deficits with ankle sprains and chronic ankle instability. Clin Sports Med. 2008;27(3):353–70.PubMedCrossRefGoogle Scholar
  8. 8.
    Wikstrom EA, Tillman MD, Chmielewski TL, et al. Discriminating between copers and people with chronic ankle instability. J Athl Train. 2012;47(2):136–42.PubMedCentralPubMedGoogle Scholar
  9. 9.
    McKeon PO, Hertel J. The dynamical-systems approach to studying athletic injury. Athl Ther Today. 2006;11(1):31–3.Google Scholar
  10. 10.
    Arnold BL, Linens SW, de la Motte SJ, et al. Concentric evertor strength differences and functional ankle instability: a meta-analysis. J Athl Train. 2009;44(6):653–62.PubMedCentralPubMedCrossRefGoogle Scholar
  11. 11.
    McKeon JM, McKeon PO. Evaluation of joint position recognition measurement variables associated with chronic ankle instability: a meta-analysis. J Athl Train. 2012;47(4):444–56.PubMedCentralPubMedGoogle Scholar
  12. 12.
    Docherty CL, Bleakley CM, Hertel J, et al. Single-leg drop landing motor control strategies following acute ankle sprain injury. Scand J Med Sci Sports. Epub 2014 Jun 27. doi: 10.1111/sms.12282.
  13. 13.
    Hiller CE, Kilbreath SL, Refshauge KM. Chronic ankle instability: evolution of the model. J Athl Train. 2011;46(2):133–41.PubMedCentralPubMedCrossRefGoogle Scholar
  14. 14.
    Hertel J. Functional anatomy, pathomechanics, and pathophysiology of lateral ankle instability. J Athl Train. 2002;37(4):364–75.PubMedCentralPubMedGoogle Scholar

Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.Department of KinesiologyUniversity of North Carolina at CharlotteCharlotteUSA
  2. 2.University of GeorgiaAthensUSA

Personalised recommendations