Pivoting around the ACL:Towards individualising care for ACL-injured patients

Despite a successful ACL reconstruction, a mere 55% of patients return to a competitive form of sports. Zee has studied several aspects involved in return to sports after ACL reconstruction. Also, he studied the feasibility of increasing patient specificity during ACL reconstruction and rehabilitation. Persistent rotatory instability after ACL reconstruction is assumed to be a profound reason to hamper return to sports. Zee showed that after ACL reconstruction the range of rotation in the knee is reduced by 17-32% compared to the preoperative state. Next, he showed that during hop tests one year after surgery, there is no evidence for increased range of rotation in the knee. Zee also showed that more natural knee movements are related with better patient reported knee function. These results show that there is a need to individualise the treatment of patients with an ACL injury. Current surgical techniques fail to recreate the preoperative movements of the knee. Both the surgical technique and the rehabilitation after surgery need a more patient specific approach. Zee describes the design and in vitro results of a patient specific mold to use during ACL reconstruction. This seems promising. Finally he has proven the feasibility of ice skating during a rehabilitation program after ACL reconstruction. This may provide a good alternative way of rehabilitation for some patients to enhance compliance

Pivoting around the ACL:Towards individualising care for ACL-injured patients

Despite a successful ACL reconstruction, a mere 55% of patients return to a competitive form of sports. Zee has studied several aspects involved in return to sports after ACL reconstruction. Also, he studied the feasibility of increasing patient specificity during ACL reconstruction and rehabilitation. Persistent rotatory instability after ACL reconstruction is assumed to be a profound reason to hamper return to sports. Zee showed that after ACL reconstruction the range of rotation in the knee is reduced by 17-32% compared to the preoperative state. Next, he showed that during hop tests one year after surgery, there is no evidence for increased range of rotation in the knee. Zee also showed that more natural knee movements are related with better patient reported knee function. These results show that there is a need to individualise the treatment of patients with an ACL injury. Current surgical techniques fail to recreate the preoperative movements of the knee. Both the surgical technique and the rehabilitation after surgery need a more patient specific approach. Zee describes the design and in vitro results of a patient specific mold to use during ACL reconstruction. This seems promising. Finally he has proven the feasibility of ice skating during a rehabilitation program after ACL reconstruction. This may provide a good alternative way of rehabilitation for some patients to enhance compliance

Pivoting around the ACL:Towards individualising care for ACL-injured patients

Despite a successful ACL reconstruction, a mere 55% of patients return to a competitive form of sports. Zee has studied several aspects involved in return to sports after ACL reconstruction. Also, he studied the feasibility of increasing patient specificity during ACL reconstruction and rehabilitation. Persistent rotatory instability after ACL reconstruction is assumed to be a profound reason to hamper return to sports. Zee showed that after ACL reconstruction the range of rotation in the knee is reduced by 17-32% compared to the preoperative state. Next, he showed that during hop tests one year after surgery, there is no evidence for increased range of rotation in the knee. Zee also showed that more natural knee movements are related with better patient reported knee function. These results show that there is a need to individualise the treatment of patients with an ACL injury. Current surgical techniques fail to recreate the preoperative movements of the knee. Both the surgical technique and the rehabilitation after surgery need a more patient specific approach. Zee describes the design and in vitro results of a patient specific mold to use during ACL reconstruction. This seems promising. Finally he has proven the feasibility of ice skating during a rehabilitation program after ACL reconstruction. This may provide a good alternative way of rehabilitation for some patients to enhance compliance

Pivoting around the ACL:Towards individualising care for ACL-injured patients

Despite a successful ACL reconstruction, a mere 55% of patients return to a competitive form of sports. Zee has studied several aspects involved in return to sports after ACL reconstruction. Also, he studied the feasibility of increasing patient specificity during ACL reconstruction and rehabilitation. Persistent rotatory instability after ACL reconstruction is assumed to be a profound reason to hamper return to sports. Zee showed that after ACL reconstruction the range of rotation in the knee is reduced by 17-32% compared to the preoperative state. Next, he showed that during hop tests one year after surgery, there is no evidence for increased range of rotation in the knee. Zee also showed that more natural knee movements are related with better patient reported knee function. These results show that there is a need to individualise the treatment of patients with an ACL injury. Current surgical techniques fail to recreate the preoperative movements of the knee. Both the surgical technique and the rehabilitation after surgery need a more patient specific approach. Zee describes the design and in vitro results of a patient specific mold to use during ACL reconstruction. This seems promising. Finally he has proven the feasibility of ice skating during a rehabilitation program after ACL reconstruction. This may provide a good alternative way of rehabilitation for some patients to enhance compliance

Pivoting around the ACL:Towards individualising care for ACL-injured patients

Despite a successful ACL reconstruction, a mere 55% of patients return to a competitive form of sports. Zee has studied several aspects involved in return to sports after ACL reconstruction. Also, he studied the feasibility of increasing patient specificity during ACL reconstruction and rehabilitation. Persistent rotatory instability after ACL reconstruction is assumed to be a profound reason to hamper return to sports. Zee showed that after ACL reconstruction the range of rotation in the knee is reduced by 17-32% compared to the preoperative state. Next, he showed that during hop tests one year after surgery, there is no evidence for increased range of rotation in the knee. Zee also showed that more natural knee movements are related with better patient reported knee function. These results show that there is a need to individualise the treatment of patients with an ACL injury. Current surgical techniques fail to recreate the preoperative movements of the knee. Both the surgical technique and the rehabilitation after surgery need a more patient specific approach. Zee describes the design and in vitro results of a patient specific mold to use during ACL reconstruction. This seems promising. Finally he has proven the feasibility of ice skating during a rehabilitation program after ACL reconstruction. This may provide a good alternative way of rehabilitation for some patients to enhance compliance

Pivoting around the ACL:Towards individualising care for ACL-injured patients

Despite a successful ACL reconstruction, a mere 55% of patients return to a competitive form of sports. Zee has studied several aspects involved in return to sports after ACL reconstruction. Also, he studied the feasibility of increasing patient specificity during ACL reconstruction and rehabilitation. Persistent rotatory instability after ACL reconstruction is assumed to be a profound reason to hamper return to sports. Zee showed that after ACL reconstruction the range of rotation in the knee is reduced by 17-32% compared to the preoperative state. Next, he showed that during hop tests one year after surgery, there is no evidence for increased range of rotation in the knee. Zee also showed that more natural knee movements are related with better patient reported knee function. These results show that there is a need to individualise the treatment of patients with an ACL injury. Current surgical techniques fail to recreate the preoperative movements of the knee. Both the surgical technique and the rehabilitation after surgery need a more patient specific approach. Zee describes the design and in vitro results of a patient specific mold to use during ACL reconstruction. This seems promising. Finally he has proven the feasibility of ice skating during a rehabilitation program after ACL reconstruction. This may provide a good alternative way of rehabilitation for some patients to enhance compliance

A Simulation of the Effects of Badminton Serve Release Height

In this work, we develop and calibrate a model to represent the trajectory of a badminton shuttlecock and use it to investigate the influence of serve height in view of a new serve rule instated by the Badminton World Federation. The new rule means that all players must launch the shuttlecock below a height of 1.15 m, as opposed to the old rule whereby the required launch height was under the rib cage of the server. The model is based on a forward dynamics model of ballistic trajectory with drag, and it is calibrated with experimental data. The experiments also served to determine the actual influence of the new rule on the shuttlecock launch position. The model is used in a Monte Carlo simulation to determine the statistical influence of the new serve rules on the player’s ability to perform good serves; i.e., serves with little opportunity for the receiver to attack. We conclude that, for the female player in question, serving below a height of 1.15 m makes it marginally more difficult to perform excellent serves. We also conclude that there might be alternative launch positions that would be less likely to produce the best serves but could be exploited as a tactical option

DEVELOPMENT OF A TEST PROTOCOL TO IDENTIFY POTENTIAL RISK FACTORS FOR LOWER LIMB INJURIES IN BALLET DANCERS

The aim of the present study was to develop a test protocol to identify potential risk factors for lower limb injuries during ballet jump landings. Two ballet dancers, a beginner level and an advanced level dancer, participated in the study. The dancers performed multiple Sautés in first position, Grand Jeté, and Grand Pas de Chat jump landings on a plantar pressure mat on top of a force platform. The participants wore ballet slipper thongs, while a three-segment kinematic model of the foot was used to provide a more detailed understanding of foot posture during landings, and to investigate how the dancers adapted to the high foot/ankle loadings. Potential risk factors were identified as high free moment peaks, high impact velocities, and improper technique with missing turnouts during landings. Furthermore, there seems a potential to distinguish between dancers’ ability levels and associated injury risks