We invite you to participate in a research study. The purpose of the study is to 1) inform the development of interventions designed specifically for people with achilles tendon pain, 2) assess what magnitude of change in symptoms is clinically meaningful, and 3) better understand factors contributing to ongoing achilles tendon pain.

We are inviting you to be in this study because you have achilles tendon pain. If you received this invitation by email, we obtained your name and email address from a research study in which you previously participated. Approximately 300 people will take part in this study.

We would like you to complete a brief screening form and 5 surveys that all together will take 10 to 20 minutes to complete. You are free to choose 'Prefer not to answer' for any question. The surveys include questions about:

- Who you are (demographic information)

- The severity and location of your achilles tendon pain during activity

- How much of a change in your symptoms is needed to have a meaningful impact on your life

- How you perceive the health of your tendon

- Screening questions related to pain psychology

If you would like to participate, then please answer the following screening questions. If you do not want to participate, then please email ruth-chimenti@uiowa.edu with an email title 'STUDY DECLINE' or complete the following 3 screening questions and decline study participation on following survey page.

We will keep the information you provide confidential, however federal regulatory agencies and the University of Iowa Institutional Review Board (a committee that reviews and approves research studies) may inspect and copy records pertaining to this research. Data will be automatically assigned an ID number based on the sequential order of people entering the study. If you do not provide an email address, then the survey is anonymous. If you provide your email address to receive compensation, then the link between the ID code and your email address will be destroyed after 5 years unless you choose to be contacted for future studies, in which case your contact information will be kept indefinitely. If we write a report about this study we will do so in such a way that you cannot be identified.

You may have some discomfort during or after performing heel raises or hops. You can choose not to perform the physical activity component of this questionnaire. Because we are collecting personal information there is the potential risk for a breach in confidentiality or invasion of privacy. Again, you can choose not to provide your email address, which would make your responses anonymous. You will not benefit personally from being in this study. However we hope that others may benefit in the future from what we learn as a result of this study.

You will not have any costs for being in this research study. You will be paid for being in this research study. However, you will need to provide your email address and complete all 5 surveys in order for us send you a $5 amazon gift ecard.

Taking part in this research study is completely voluntary. If you decide not to be in this study, or if you stop participating at any time, you won't be penalized or lose any benefits for which you otherwise qualify. If you have any questions about the research study itself, please contact Ruth Chimenti, DPT, PhD at ruth-chimenti@uiowa.edu. If you experience a research-related injury, please contact: Ruth Chimenti, DPT, PhD by phone at 319-335-7149 or by email at ruth-chimenti@uiowa.edu. If you have questions about the rights of research subjects, please contact the Human Subjects Office, 105 Hardin Library for the Health Sciences, 600 Newton Rd, The University of Iowa, Iowa City, IA 52242-1098, (319) 335-6564, or e-mail irb@uiowa.edu. To offer input about your experiences as a research subject or to speak to someone other than research staff, call the Human Subjects Office at the number above.

Thank you very much for your time and consideration,

Ruth Chimenti, DPT, PhD University of Iowa, Department of Physical Therapy and Rehabilitation Science, Iowa City, IA, United States

Ebonie Rio, Ba. App Sci, Ba Phys (hons), Masters Sports Phys, PhD LaTrobe University, College of Science, Health and Engineering, School of Allied Health, Department of Rehabilitation, Nutrition and Sport, Melbourne, Australia

Karin Silbernagel, PT, PhD, ATC University of Delaware, College of Health Sciences, Newark, Delaware, United States

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