abstract background and aim: lack of balance in pattern and activity of quadriceps and hamstring muscles increases the risk of anterior cruciate ligament injury (acl). the purpose of the present study was to investigate the changes in pattern and activity of vastus medialis and semitendinosusmuscles in landing from different heights and to understand if these changes will increase the risk of a...

BACKGROUND Neuromuscular training that includes both plyometric and dynamic stabilization/balance exercises alters movement biomechanics and reduces ACL injury risk in female athletes. The biomechanical effects of plyometric and balance training utilized separately are unknown. HYPOTHESIS A protocol that includes balance training without plyometric training will decrease coronal plane hip, kn...

The aim of this research was to determine if additional twists in the forward and backward somersaults increase landing asymmetries. Twelve gymnasts from the Slovenian national artistic gymnastics team took part in the research. Each gymnast performed various stretched forward and backward somersaults with or without a twist. We used several dynamic and kinematic variables to assess landing asy...

Relative navigation of an aircraft (fixed wing or helicopter) close to ships at sea is a unique navigation problem. Shipboard helicopter operations provide a difficult operational environment. Wind over deck and wake turbulence shed by ship super structure offer challenging and unpredictable conditions during takeoff and landing. This is especially true in the operational environment that inclu...

The landing task is fundamental to Micro air vehicles (MAVs) when attempting land in an unpredictable environment (e.g., presence of static obstacles or moving obstacles). MAV should immediately detect the through its sensors and decide actions for landing. This paper addresses problem autonomous approach a commercial AR. Drone 2.0 uncertain indoor environment. A localization methodology estima...

objective(s): the effect of silica nanoparticles (snps) in sport shoes outsoles on the  parameters related to anterior cruciate ligament (acl) injury has not been investigated. the aim of this study was to investigate the effect of shoes outsole containing a composite of thermoplastic elastomer based on styrene-butadiene and silica nanoparticles (tpen shoe) on knee valgus angle (kva) as a risk ...

CONTEXT Continued research into the mechanism of noncontact anterior cruciate ligament injury helps to improve clinical interventions and injury-prevention strategies. A better understanding of the effects of anticipation on landing neuromechanics may benefit training interventions. OBJECTIVE To determine the effects of anticipation on lower extremity neuromechanics during a single-legged lan...

Companies with global operations should consider the culture of their target country in order to be internationally successful despite of globalization. Every marketing strategy should be adapted to the target country and its local cultural background. Companies which offer their products only through online channels need to pay special attention to the design of their websites. Therefore, we a...

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...