The aim of this study is to examine the cardiovascular effects of ultramarathon running and their relation to performance.

The purpose of the study is to determine the changes of cardiovascular morphology and function after an ultramarathon race. 50 entrants to the "Spartathlon 2017" 246-km running race will participate in the study. Cardiac and arterial morphology and function tests will be conducted one day before the race and within 20 minutes of race completion.

Inclusion Criteria:

• Runners at least 18 years old, healthy and sufficiently trained.
• Runners being accepted to participate in the Spartathlon race according to the eligibility criteria (http://www.spartathlon.gr/en/registration-en.html)
• Runners who will volunteer to be examined pre- and post the race

Exclusion Criteria:

• Runners with chronic diseases
• Runners receiving any medication

No personal details will be shared. Only the results of the measurements will be available

Before and after the race