Females are at higher risk for non-contact anterior cruciate ligament (ACL) injuries compared to males, in part due to sex-based differences in neuromuscular control during high-risk tasks such as jump landing.  Strength development during puberty tends to be lower and delayed in females compared to males; this may result in compensatory neuromuscular control patterns that placefemales at higher risk for ACL injury. The relationship between strength development andneuromuscular control is not currently known.The objective is to determine the effect of sex, strength, and pubertal stage on neuromuscular control during jump landing in middle school children.