In 1993, she was appointed Professor of Sociology at Uppsala University by the government of Sweden, to study the "relation between power and gender in family and society, in particular men's violence against women".

She was installed as a professor with a military parade and gave her inaugural lecture on eroticised power in Uppsala Cathedral.

Theoretically, Lundgren has focused on developing the concept of the process of normalisation, a model to explain how battered women gradually break down and accept the violent situation.

Lundgren has also argued that men who systematically use sexualised violence against their partner do so in order to consolidate their position of power, rather than to satisfy a sexual desire.

[8] The university committed itself to restoring Lundgren's reputation, granting her and her research group increased funding in compensation for having subjected her to an unjustified inquiry.

[11] In the context of the Me Too debate in 2017, the Swedish newspaper Svenska Dagbladet wrote that Lundgren had been proven right and that the criticism of her in the early 2000s had been discredited.

[12] In 2018, also in the context of the Me Too debate, Lundgren and legal scholar Jenny Westerstrand wrote that the Swedish journalistic profession bore a large part of the blame in Sweden for the problems the debate had highlighted because Swedish journalists had systematically attacked critical discussion of and research on men's violence against women for over 20 years.