1/2 hour slow breast stroke daily for 3 months. Start to have bilateral golfers elbow 1 month ago. How can that happen? Have to stop swimming?

Cross train. Elbow pain associated with swimming breast stroke may signal overuse and/or improper technique. Suggest a coach to watch your stroke and add any needed corrections. You can also incorporate other strokes in your workout, such as freestyle. Days off or cross training with cycling will allow for recovery of overused joints.