Acta Physiologica 2011; Volume 203, Supplement 686
Joint Congress of FEPS and Turkish Society of Physiological Sciences
ANTERIOR CRUCIATE LIGAMENT RECONSTRUCTION IMPROVES THE METABOLIC ENERGY COST OF LEVEL WALKING AT CUSTOMARY SPEEDS
Abstract number: PC225
Dal1 U[gbreve]ur, Colak2 Mehmet, Ayan2 Irfan, Yaroglu2 Turan, Dag1 Figen, Yilmaz2 Cengiz, Beydagi1 Hüseyin
1Department of Physiology, School of Medicine, University of Mersin, Mersin, Turkeyof Mersin, Mersin, Turkey
2Department of Orthopaedics and Traumatology, School of Medicine, University of Mersin, Mersin, Turkey
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
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 50-70-90-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.
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).
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.
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Acta Physiologica 2011; Volume 203, Supplement 686 :PC225