Well, yes and no. Let us make it clear. Any joint, including that affected by arthritis needs physical activity. A lack of movement can lead to deterioration as a result of two factors: reduction in metabolism in the immobile joint and degradation of the muscle relieving the load on the joint. Therefore, the movement is necessary. But the mode and type of loads must be carefully selected. Shock loads on the joint should be absolutely avoided. Mobility periods must alternate with the rest.
In the case of intense workouts pain can actually decrease, but for a short period. This is due to the release of endorphins that accompanies intense motor activity. The danger of this situation consists in the fact that under the guise of endorphins an intensified destruction of articular cartilage and, naturally, the development of osteoarthritis occur.