One of the great things about training on a bicycle is that it’s easy on your joints. But the upright posture of an exercise bike doesn’t suit everyone. Narrow seats may be uncomfortable, and conditions such as arthritis can make a traditional training bike more painful than beneficial. That’s were recumbent exercise bikes shine. The reclined posture reduces stress on the lower back, shoulders, and arms while focusing effort where you want it—on the legs and lungs. If you like cycling but find an upright bike uncomfortable, a recumbent trainer may be the best alternative. Here are a few features to look for.