Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
from September 2014
©Journal of Sports Science and Medicine (2011) 10, 655 - 664

Research article
Improving Functional Performance and Muscle Power 4-to-6 Months After Anterior Cruciate Ligament Reconstruction
Sabrine Souissi1,6, Del P. Wong2, , Alexandre Dellal1,3,7, Jean-Louis Croisier4, Zied Ellouze5, Karim Chamari1,6
Author Information
1 National Centre of Medicine and Science in Sport (CNMSS) - El Menzah, Tunisia
2 The Hong Kong Institute of Education, Hong Kong
3 Olympique Lyonnais FC (soccer),
4 Department of Motricity Sciences, Liège, Belgium
5 Aspetar-Orthopeadic and Sports Medicine Hospital, Doha, Qatar
6 University of Manouba, Tunisia
7 Santy Orthopedicae Clinical, Sport Science and Research Department, Lyon, France

Del P. Wong
✉ Department of Health and Physical Education, The Hong Kong Institute of Education, Hong Kong.
Publish Date
Received: 31-03-2011
Accepted: 05-09-2011
Published (online): 01-12-2011
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The purpose of this study was to examine the effects of 8-week retraining programs, with either two or three training sessions per week, on measures of functional performance and muscular power in athletes with anterior cruciate ligament reconstruction (ACLR). Sixteen male athletes were randomly assigned to two groups after ACLR: a functional training group (FTG, n = 8) training 2 intense sessions per week (4hrs/week), and a control group (CG, n = 8) training 3 sessions per week with moderate intensity (6hrs/week). The two groups were assessed at four and six months post-ACLR and the effects of retraining were measured using the following assessments: the functional and the muscular power tests, and the agility T-test. After retraining, the FTG had improved more than the CG in the operated leg in the single leg hop test (+34.64% vs. +10.92%; large effect), the five jump test (+8.87% vs. +5.03%; medium effect), and single leg triple jump (+32.15% vs. +16.05%; medium effect). For the agility T-test, the FTG had larger improvements (+17.26% vs. +13.03%, medium effect) as compared to the CG. For the bilateral power tests, no significant training effects were shown for the two groups in the squat jump (SJ), the counter movement jump (CMJ) and the free arms CMJ (Arm CMJ). On the other hand, the unilateral CMJ test with the injured and the uninjured legs showed a significant increase for the FTG with respect to CG (p < 0.05). The present study introduces a new training modality in rehabilitation after ACLR that results in good recovery of the operated limb along with the contra-lateral leg. This may allow the athletes to reach good functional and strength performance with only two physical training sessions per week, better preparing them for a return to sport activity at 6 months post- ACLR and eventually sparing time for a possible progressive introduction of the sport specific technical training.

Key words: ACL reconstruction, knee injury, retraining, agility, strength testing, power testing

           Key Points
  • Functional training (plyometrics, neuromuscular, proprioceptive and agility exercises) in athletes during 4th to 6th months post-ACLR further improved functional outcomes, compared to a conventional rehabilitation program.
  • The former program was more time-efficient compared to the latter one as indicated by the weekly training duration (4hrs/week vs. 6hrs/week).
  • This study provides evidence of the functional training in knee rehabilitation and provides important information that is highly relevant to clinicians, physiotherapists, coaches and trainers who are in charge of the injured athletes during the later phase of the rehabilitation after ACLR.
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