When it comes to exercise, it’s possible to get too much of a good thing.

The kind of detrimental excess endurance exercise I’m going to implicate includes marathon distance running, 160km bike rides, Ironman triathlons, and other flat-out, pedal-to-the-metal exertions for more than an hour.

Hyper-exercisers tend to be ‘type A’ individuals. This fits the profile of many of us in medicine.

In case you haven’t got the moderation message, especially those of you over 40 and running more than an hour, I’m going to share my experience.