###### Abstract
Identification of these movement dysfunctions may serve as a predictor of injury and can be addressed by the appropriate professionals prior to the emergence of symptoms within a sporting context. Specifically, [PERSON] and [PERSON] [17] stated that the ability to identify uncontrolled movement strategies is imperative to enable risk management strategies to be developed, which can mitigate the propensity for (re)injury through increased localized strength and/or enhanced motor control. Several mechanical dysfunctions have been associated with functional/dynamic assessments as injury predictors. Multiple studies have suggested that uncontrolled knee motion in the frontal plane when landing is a good predictor of ACL injury [22; 23; 24]. Additionally, compensatory strategies have been demonstrated in jump landings following injury [25; 26]. The neuromuscular control associated with this form of dysfunctional, maladaptive movement pattern has been suggested as a potentially modifiable risk factor [27]. The utilization of unilateral tasks further enhances the assessment through the identification of limb asymmetry when compared to bilateral assessments [15; 16; 18]. However, research regarding cutting tasks (change of direction) suggests that large frontal plane knee excursions are necessary in order to complete the task and may not be indicative of uncontrolled motion [28; 29; 30; 31]. Therefore, drop jumping landing tasks may not be appropriate for assessing injury risk during rotational sporting tasks. Designing an appropriate task to identify the predictors of rotary injury risk during dynamic sports-specific activity must include several components: high-velocity loading force, a certain degree of motor control complexity to complete the task, bilateral assessment, and multi-planar movement. A novel unilateral 180\({}^{\circ}\) jump task could potentially fulfill all the aforementioned requirements and better mimics the dynamic multi-planar nature of sports that involve jumping, pivoting, and forceful changes in direction (i.e., rugby, soccer, basketball, American football). Additionally, as athletes performing rotational movements are the target population for this assessment, using elite-level athletes, such as rugby players, will provide greater external validity of findings. Considering the unilateral 180\({}^{\circ}\) jump as a potential physical assessment tool for rotational injury prediction in the lower body first requires a demonstration of its utility. Therefore, the purpose of this investigation is to analyze the unilateral 180\({}^{\circ}\) jump in elite-level rugby players by (1) providing descriptive kinematic of the knee, thigh, and pelvis, (2) conducting inter-segmental coordination analysis between the thorax and pelvis, and (3) comparing the knee kinematics between the dominant and non-dominant limb during the loading and landing phase. It is hypothesized that the greater rotational component will demonstrate greater frontal plane kinematics (greater peak abduction/adduction angles) of the knee during landing to compensate for the high torsional energy transfer through the kinetic chain. Similarly, greater peak frontal plane knee kinematics will be associated with a shoulder led transverse thorax-pelvis relative phase angle. More simply, we believe that greater knee adduction angles will be observed in individuals who utilize a shoulder led rotation pattern.