2024 : 7 : 14
Sayed Esmaeil Hosseininejad

Sayed Esmaeil Hosseininejad

Academic rank: Assistant Professor
Education: PhD.
Faculty: Faculty of Physical Education and Sports Sciences
Address: Iran - Mazandaran - University of Mazandaran - Faculty of Sport Science
Phone: 011-35302201


Does core stability training improve hopping performance and kinetic asymmetries during single-leg landing in anterior cruciate ligament reconstructed patients?
Knee injury; hop test; rehabilitation; ground reaction force
Journal Research in Sports Medicine
Researchers Mohammad fallah mohammadi ، komeil dashti rostami ، Sedighe Shabanzadeh ، Sayed Esmaeil Hosseininejad ، Salman Ghaffari ، Abbey Thomas


Safe return to sport (RTS) after anterior cruciate ligament reconstruction (ACLR) surgery is important. Core stabilization is common within rehabilitation, but its influence on hopping performance and single-leg landing kinetics among athletes post-ACLR is unclear. Twenty-four male professional athletes who had ACL reconstruction surgery (time since surgery = 11.47 ± 1.55 months) were recruited and randomly assigned to exercise (n = 12) and control (n = 12) groups. Exercise group received an 8-week core stability exercise program. Limb symmetry index (LSI) for single-leg hop for distance (SLH) and triple hop (TRH) tests, and single-leg landing kinetics (multidirectional ground reaction forces) were measured pre- and post-intervention. In post-test, the participants in exercise group were more symmetrical in SLH (P = .04, CI = 0.01–7.68) and TRH (P = .01, CI = 0.28–11.1) distances. They also improved their LSI values for vertical ground reaction force (vGRF), though not significantly (P < .05). LSI for anteroposterior (a-p) and mediolateral (m-l) GRFs remained unchanged for participants of both groups. Our findings indicate the positive effect of core exercise on decreasing between-limb asymmetries during SLH and TRH tests. Our results demonstrate that despite lack of change in kinetics, functional performance is more symmetrical following core stability training.