Experienced gymnasts are considered by many to be landing experts, because they are able to successfully land from heights of 3m or more (McNitt-Gray, 1993). Although gymnasts may be landing experts, their landing mechanics cannot be determined solely by optimal landing strategies because the judging system places constraints on how a landing is to be performed. Gymnasts spend many years perfec...

BACKGROUND There is limited insight into the mechanisms of anterior cruciate ligament injuries in alpine skiing, particularly among professional ski racers. PURPOSE This study was undertaken to qualitatively describe the mechanisms of anterior cruciate ligament injury in World Cup alpine skiing. STUDY DESIGN Case series; Level of evidence, 4. METHODS Twenty cases of anterior cruciate liga...

BACKGROUND Injury prevention training has been shown to be effective in reducing the incidence of noncontact anterior cruciate ligament (ACL) injury; however, the underlying reason for the success of these training programs is unclear. PURPOSE To investigate whether an ACL injury prevention program that has been shown to reduce the incidence of ACL injury alters sagittal plane hip and knee bi...

You've landed the perfect job, but now you must face your current employer and deliver the news that you're leaving the organization. While an exciting time, this can also certainly be a stressful one. Here are some strategies and ideas for saying goodbye to an employer that may be useful in guiding your actions. From being ready for counter-offers to downright hostility, you need to be prepare...

Autonomous landing is one of the must-have operations of unmanned aerial vehicles such as drones. In this paper we describe an approach for fully autonomous landing of AR.Drones. This approach consists of two components – identifying and recognizing a proper pattern used to mark the landing area and reaching the landing area (landing) even if small disturbances occur. We discuss possible patter...

Background: Mechanical occlusion of the Left atrial appendage (LAA) using a purpose-built device has emerged as an effective prophylactic treatment in patients with atrial fibrillation at risk of stroke and a contraindication for anticoagulation. A crucial step in procedural planning is the choice of the device size. This is currently based on the manual analysis of the “Device Landing Zone” fr...

CHICAGO — Many of today's running shoes feature a heavy cushioned heel. New research presented today at the 2013 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS) found that these shoes may alter an adolescent runner's biomechanics (the forces exerted by muscles and gravity on the skeletal structure) and diminish performance. Researchers recruited 12 adolescent competitive a...

Research on dance lower extremity joint motion has been limited. Thus, the purpose of this study was to investigate limb biomechanics differences between side chasse step (SCS) and bounce (BS) second landing phase in Jive. Thirteen female recreational Latin dancers (Age: 22 ± 2.5 years; Height: 1.65 0.05 m; Weight: 50 4.5 kg; Dance experience: 4 2 years) were involved experiment. The same music...

Background: Studies on how the shoe insole hardness regulate joint stiffness and transfer energy in the lower extremity during jump landing are scarce. The current study aimed to determine the effectiveness of shoe insole changes in joint power and stiffness during landing from jumps. Methods: Fifteen healthy male athletes volunteered to perform jump-landing in various shoe insole conditions. ...