This paper deals with the simulation of landing gear semi-active control for a small trainer aircraft in a multibody framework. The behavior of single passive landing gear drop test simulation models and of a complete aircraft landing simulation model, developed and implemented in the commercial multibody code ADAMS in previous works, is compared to the that of analogous models equipped with se...

This study examined relationships between three dimensional (3D) pelvis, hip and knee biomechanical measures in a bodyweight single leg squat and those same measures in a drop landing and a pre-planned 75° cutting manoeuvre. 40 field sports players with chronic athletic groin pain were recruited. There were no significant (p > 0.05) correlations between hip and pelvis measures in the SLS and th...

Few rigorous scientific studies have investigated how the corresponding neuromuscular activity in the lower extremity occurs during different landing control movements in response to different impact signals. This study aimed to determine the potential shoe effects on impact signals, neuromuscular responses and their possible interactions in different human landing movements. Twelve male basket...

Controlling dynamic interactions between the lower limb and ground is important for skilled locomotion and may influence injury risk in athletes. It is well known that female athletes sustain anterior cruciate ligament (ACL) tears at higher rates than male athletes, and exhibit lower extremity biomechanics thought to increase injury risk during sport maneuvers. The purpose of this study was to ...

OBJECTIVE To evaluate landing strategies of female football and basketball athletes with relation to possible injury mechanisms and disparity in injury. DESIGN Descriptive laboratory study. PARTICIPANTS 52 female football players and 41 female basketball players. MAIN OUTCOME MEASURES Frontal plane projection angle (FPPA) was measured during the single leg land (SLL) and drop jump (DJ) sc...

CONTEXT Fatigue has been shown to disrupt dynamic stability in healthy volunteers. It is not known if wearing prophylactic ankle supports can improve dynamic stability in fatigued athletes. OBJECTIVE To determine the type of ankle brace that may be more effective at providing dynamic stability after a jump-landing task during normal and fatigued conditions. DESIGN Two separate repeated-meas...

The purpose of this study was to determine if an appropriate drop jump height for female athletes could be determined from squat and/or power clean maximums. Thirteen female collegiate basketball or volleyball players had their appropriate drop jump height determined by both maximal jump height (MJH) and reactive strength index (RSI) methods. The two methods often determined different appropria...

CONTEXT Landing kinematics have been identified as a risk factor for knee injury. Detecting atypical kinematics in clinical settings is important for identifying individuals at risk for these injuries. OBJECTIVE To determine the reliability of a handheld tablet and application (app) for measuring lower-extremity kinematics during drop vertical-jump landings. DESIGN Measurement reliability. ...