Competing in triathlons could be dangerous for your health as we age.

Research is finding that men over the age of 60 have a higher risk of sudden death during triathlons.

Scientists at the Minneapolis Heart Institute Foundation looked at 135 sudden deaths during triathlons over 10 years also found the risk of triathlon-related death in men started going up at about age 40.

Death during a triathlon is still quite rare – less than one-in-100,000 for women and a little over double that for men.

The study also found that most of the deaths occurred during the swimming leg of the triathlon.

You can read about the study in the Annals of Internal Medicine.