Henri is a Research Fellow of Sports Sciences in the Institute of Sport Sciences and Physiotherapy, University of Tartu. The theoretical background of his work is based mainly on the self-determination theory. More specifically, he works on the topic of teachers’ multidimensional autonomy-supportive and controlling behaviours, students’ psychological need satisfaction and frustration, and students’ autonomous and controlled forms of motivation in the context of physical education. He has also developed and tested the effectiveness of several intervention programs with the aim to improve psychological need satisfaction and autonomous forms of motivation among students in the context of physical education.