Knee Surgery, Sports Traumatology, Arthroscopy

, Volume 19, Issue 8, pp 1271–1276 | Cite as

Anterior cruciate ligament reconstruction improves the metabolic energy cost of level walking at customary speeds

  • Mehmet Colak
  • Irfan Ayan
  • Ugur Dal
  • Turan Yaroglu
  • Figen Dag
  • Cengiz Yilmaz
  • Huseyin Beydagi
Knee

Abstract

Purpose

The metabolic energy cost of walking is altered by pathological changes in gait. It is thought that anterior cruciate ligament (ACL) deficiency alters the energy requirement for level walking through its effect on gait pattern. In this study, it is hypothesised that the metabolic energy cost of walking would improve after ACL reconstruction.

Methods

Eight patients who were undergoing ACL reconstruction for an isolated rupture were included in this prospective study. Clinical examinations, Lysholm scores and metabolic tests were performed preoperatively and at 3, 6 and 12 months after ACL reconstruction using autologous quadruple hamstring tendons. For the metabolic evaluation, net oxygen cost was calculated while walking on a treadmill at 50-, 70- and 90-m/min velocities. A two-way factorial ANOVA was performed in order to evaluate the primary effects and interactions of the time point and velocity variables on net oxygen cost.

Results

All patients had positive Lachman and anterior drawer tests preoperatively that became negative postoperatively and remained negative until the last follow-up point. The mean preoperative Lysholm score was 66, whereas the mean postoperative follow-up scores were 85, 91 and 94, respectively. The interaction between follow-up time point and velocity was not significant. Regardless of the selected velocity, the net oxygen cost was lower than that at preoperative levels at each postoperative time point (p < 0.05).

Conclusion

The results of the present study indicate that the energy cost of level walking in chronic ACL-deficient patients improves after ACL reconstruction. Cause–effect-based studies with correlation evaluations that compare kinetic, kinematic and electromyographic data and metabolic cost calculations should facilitate more accurate analyses.

Level of evidence

Therapeutic study, Level 4.

Keywords

Anterior cruciate ligament Anterior cruciate ligament reconstruction Energy expenditure of walking Gait Oxygen cost 

Notes

Acknowledgments

We would like to thank to A. Taner Erdogan for his valuable support.

Conflict of interest

The authors declare that they have no conflicts of interest.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Mehmet Colak
    • 1
    • 3
  • Irfan Ayan
    • 1
  • Ugur Dal
    • 2
  • Turan Yaroglu
    • 1
  • Figen Dag
    • 2
  • Cengiz Yilmaz
    • 1
  • Huseyin Beydagi
    • 2
  1. 1.Department of Orthopaedics and Traumatology, School of MedicineUniversity of MersinMersinTurkey
  2. 2.Department of Physiology, School of MedicineUniversity of MersinMersinTurkey
  3. 3.Mersin Universitesi Tip Fakultesi HastanesiMersinTurkiye

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