I've probably already got my second hernia from cycling. I'm more of a "masher" who pedals big gears. I also often use my triathlon handlebars for time trials. Can such a sitting position, combined with heavy pedalling, actually lead to hernias? (Rolf Hösterey, by e-mail)
Dr Eifler: An inguinal hernia is a widening of the inguinal canal. Depending on the extent of the hernia, part of the intestinal wall slips into this gap; the usual small inguinal hernias can often be recognised by a small bulge in the groin area that can be pushed away. An inguinal hernia is usually caused by increased pressure on the abdominal cavity, for example when lifting weights. When riding a road bike, the area of the abdominal cavity is not exposed to such strong pressure, at most if you are riding in an extreme riding position where the lower abdominal area is strongly bent. But even then, it is unlikely that you will suffer a hernia from this strain alone. Riding large gears cannot lead to a hernia either.
However, if you have a family history of hernias, it is quite possible that you have a congenital tendency to hernias - in which case you should avoid cycling in extreme riding positions such as the aerodynamic triathlon position.
Photo: Medical Pictures
