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You are invited to participate in this research study entitled the Ultrarunners Longitudinal TRAcking (ULTRA) Study.  This study will follow your health status over a number of years.  You may participate in this study if you have completed at least one ultramarathon (50 K or longer). 

The main purpose of the study is to determine if high levels of exercise alter health risks compared with sedentary or moderately active lifestyles.  Another aspect of the study is directed at the development of functional questionnaires.   

Your participation will involve completion of the following questionnaire, and periodic follow-up questionnaires over the course of many years.  Each questionnaire may require up to 30-45 minutes to complete. 

You may reach the Principal Investigators, Dr. Marty Hoffman (VA Northern California Health Care System) at (916) 843-9027 or at and Dr. Eswar Krishnan (Stanford University) at (650) 725-8004 or at to discuss any questions or concerns you may have about the study.

In addition you can also contact the Stanford Institutional Review Board office at 1-866-680-2906 or the VA Northern California Health Care System Institutional Review Board office at (916) 366-5359 if you have questions regarding your rights as a research subject, or if problems arise which you do not feel you can discuss with the Investigators.

Some of the information collected in this study will be personal and involve your medical history.  We will do our best to make sure that the information we gather will be kept private.  However, we cannot guarantee total privacy.  You can omit questions you consider to be sensitive enough that you prefer not to answer. 

The information is being collected and managed with Qualtrics electronic data capture tools hosted at Stanford University.  Qualtrics is a secure, web-based application designed to support data capture for research studies.  For more details on this secure system, see:

Please open and review the attached Informed Consent Form and HIPAA Authorization Form by clicking on the following link: ULTRA Study Consent.  If you agree to take part, please answer "yes" below.  You can also print a copy for your records.

I consent to participate in this study.

I provide permission for my private health information to be used for research purposes.

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