Bone health is promoted through regular weight-bearing physical activity that use muscular strength and power and exert force on the skeleton above normal amounts. This project will expand the knowledge about how strength training can be used as a component of treatment in ED. Strength training has several benefits for persons with and without ED, however the existing studies have not examined one of the most important parameters, i.e. bone health. This project therefore seeks to assess parameters which allow us to explore the effects of strength training in details. Furthermore, we will examine and take the participants' own experiences into account. This is important so that future treatment can design and adapt the exercises to each individual.