Cycling, like any sport, has particular injuries that are more common than others. One of these is the elbow, with the tendons under strain from constant grip of the handlebars. For road cyclists, this happens over longer rides, or when there's no chance for rest. For off-roaders and mountain bikers, it's when rough terrain sends shock and stress up through into the hands and elbows where the arms are held firm.
Wearing a cycling elbow support is one of the best solutions here, as it actively protects and relieves the tendons, speeding up recovery and reducing strain on the joint.