BackgroundDuring the adolescent growth spurt, youth athletes can experience rapid changes in centre of mass, limb length and moments of inertia, with some athletes also experiencing transient changes in coordination, postural and neuromuscular control. These sensorimotor system changes have been proposed to increase injury risk in adolescence due to the impact on the movement patterns of sporting and non-sporting tasks.ObjectiveTo understand if maturity status impacts unilateral sporting task performance in adolescent multisport athletesDesignCohort StudySettingField based setting within sporting clubs and academiesParticipants76 male and female athletes (n = 24 pre-PHV, n = 28 circa-PHV, n= 33 post-PHV) multisport athletes participated in this studyInterventionsSingle leg squat and single leg land were analysed via qualitative assessment of single leg loading (QASLS), maturity status was determined via non-invasive maturational equation via predicted percentage of adult stature (PAH%)Main Outcome MeasureQualitative QASLS score of movement quality, maturity statusResultsSignificant interactions were identified indicating PHV group differences of unilateral task performance for both single leg squat and single leg landing. Unilateral movement task strategies had difference prevalence at different percentages of PAH%, with an observed trend in those at the higher end of PAH% using fewer movement strategies to complete unilateral tasks than those at lower PAH%. The interaction effect between sex, maturational status and unilateral task performance was non-significant suggesting that sex specific differences did not impact multisport athlete unilateral task performance as evaluated by compound QASLS score.ConclusionsThe findings of this study support an effect of maturation on unilateral task performance by multisport athletes, with different movement strategies associated with different phases of maturational status during unilateral squatting and landing tasks. This has implications and considerations for injury, its monitoring and preventions.