LONSDALE, C., and K. HODGE. Temporal Ordering of Motivational Quality and Athlete Burnout in Elite Sport. Med. Sci. Sports Exerc., Vol. 43, No. 5, pp. 913-921, 2011. Introduction: Using self-determination theory as the theoretical framework, we conducted a longitudinal investigation of the relationships between motivation and athlete burnout. We tested four hypotheses: H-0: low self-determination (SD) does not precede burnout, and burnout does not precede low SD; H-1: low SD precedes burnout; H-2: burnout precedes low SD; and H-3: burnout and motivation have a reciprocal relationship. Methods: We used a two-wave design, with the follow-up assessment 4 months after baseline. Elite New Zealand athletes (n = 119, mean age = 24.74 yr (standard deviation = 8.54 yr); 57.14% of whom were females) completed the Athlete Burnout Questionnaire and the Behavioral Regulation in Sport Questionnaire. Structural equation modeling of cross-lagged panel models was used to test the hypotheses. Results: The relationship between motivation and burnout varied depending on the type of motivation assessed. Analyses related to overall levels of self-determined motivation, amotivation, and controlled forms of extrinsic motivation provided support for H-1: low SD precedes burnout. When compared with external regulation, introjected regulation seemed to be a clearer antecedent of athlete burnout. Analyses related to the self-determined forms of extrinsic motivation provided support for H-2: burnout precedes low SD. The only analyses in which the null hypothesis could not be rejected were those relating to intrinsic motivation. Finally, there was little support for a reciprocal effects model. Conclusions: Low levels of self-determination may lead to increases in athlete burnout, whereas athlete burnout may precede decrements in self-determined extrinsic motivation. Particular efforts could be made to help support the basic psychological needs of athletes with controlled forms of motivation, thereby leading to an internalization of motivation and decreased risk of burnout.