Background: Osteoarthritis is the most common rheumatic arthritis in Sweden. In total, between 7 to 800,000 people in Sweden suffering for osteoarthritis. Osteoarthritis involves an imbalance between the formation and degradation of articular cartilage that leads to loss of function, stiffness and pain in the joint. With exercise, you can both prevent disease and reduce symptoms. Studies have shown that exercise gives equally good pain relief as pain relievers, in mild to moderate osteoarthritis. To practice the sense of connection and coping abilities can be a way to increase the sense of self-efficacy and a way to learn to deal with pain and illness. Aim: To investigate how strength training affects people with osteoarthritis in terms of pain and mobility. Method: A literature review where ten scientific articles were included and examined, and then compared and combined in a result. Results: Strength training provides great advantages for people with osteoarthritis. What kind of training does not seem to play any major role. The main thing is that it strengthens the muscles to relieve the joint, resulting in reduced pain and greater mobility. Conclusion: Strength training affects people with osteoarthritis in a positive way in terms of both strength and flexibility. In the studies reviewed was a significant difference in the groups where strength is used as a treatment.