Quick presentation of the study procedure

Hi there! Welcome to our prenatal yoga study.

Access the online survey here

What is the goal of the study ?

This study aims

1) to assess change in women’s low back pain and/or pelvic girdle pain after a prenatal yoga class

2) to identify predictors associated with a potential change. 

Who can participate ? 

This study is for:

  • pregnant women,
  • 18 years or older,
  • living in USA,
  • who have pain or discomfort in their low back or  pelvic girdle and
  • who are doing prenatal yoga. The yoga class can be either a face-to-face class, an online class, « live » or not.

Women with all levels of experience in yoga and at any age of pregnancy are welcome to complete the survey.

What is involved ?

Within 30 minutes after your prenatal yoga class you will complete, only once, an anonymous online survey.


You should always ensure with your health provider that you do not have contraindication to the practice of yoga. The prenatal yoga class is independent to the study. The researcher and anyone involved in this study are not responsible for any injury, condition or damage that you may sustain as a result of following a yoga class. 


Access the online survey

Thank you very much to all the participants in the pilot phase who already completed the survey last month. Your input were valuable!

More Information

Purpose of the Research

This research study is part of Caroline Lonfat Master thesis project from the European Master of Science in Midwifery, Hannover Medical School, Germany, under the supervision of Professor Dr. Mechthild M. Gross, midwife.

The purpose of this study is to assess change in women’s lumbopelvic pain after a prenatal yoga class and to identify predictors associated with a potential change. In the following survey, the term “lumbopelvic pain” will refer to the pain or discomfort you have either on your low back and/or on your pelvic girdle.

This study aims to enrol at least 100 participants. We thank you for your interest and invite you to read this information and consent form before starting the questionnaire. 

Explanation of Procedures

If you agree to take part in this study, you will be asked to complete an online questionnaire after your yoga class.

This questionnaire will ask you:

  • to rate your lumbopelvic pain before and after the class,
  • to answer demographic questions,
  • questions regarding your current and past pregnancies (e.g. gestational age, number of children) and
  • questions on your yoga practice and lumbopelvic pain history.

Please note that the questionnaire should be filled within 30 min after the end of your prenatal yoga class. The survey will take you approximately 10 to 15 minutes to complete. You will answer the survey one time only. 

Inclusion and Exclusion Criteria

You can participate in this study if you (1) are pregnant, (2) are living in the United States, (3) are at least 18 years old, (4) participated in a « prenatal yoga class » within last 30 minutes (either in-person or online) (5) had lumbopelvic pain or discomfort before the yoga class and (6) did not answer this survey already. 

Risks and Discomforts

We believe there are minimal risks associated with this research study.

A risk of breach of confidentiality always exists and we have taken steps to minimize this risk: any information you provide will be kept anonymous, used only for the purposes of completing this study, and will not be used in any way that can identify you. All survey responses will be kept in a secured environment. Your IP address will not be recorded and the researcher will use a safe password to access the information. The server hosting the survey (SoSciSurvey) is located in a datacentre certified ISO27001 and warranting organizational, constructional, technical, and supply security. 

Although the nature of the questions makes this risk minimal, if you feel uncomfortable while answering the survey, you will have the possibility to specify that you do not wish to answer, to skip some questions, or to stop the survey at any point.


You may not directly benefit from taking part in this study. However, our research may indicate if pregnant women perceive some change on their lumbopelvic pain from a single yoga class, and if this change is linked to certain predictors (such as previous experience of yoga, duration of pain, length of the yoga class, etc.). That information could be useful for prenatal yoga professionals, for health care providers caring for pregnant women with lumbopelvic pain, and could therefor benefit future pregnant women.


The online survey will be anonymous. You will not be asked questions that could identify you.

Voluntary Participation and Withdrawal

Whether or not you take part in this study is your choice. You are free to refuse to participate in this research project or to withdraw your consent and discontinue participation in the project at any time without penalty. This will not influence your relationship with your yoga studio or your yoga teacher.

Cost of Participation

There will be no cost to you for taking part in this study. 

Payment for Participation in Research

You will not receive any compensation for being in this research study.


The researcher, Caroline Lonfat, will welcome your questions by phone or via email. 

Email address: Caroline.M.A.Lonfat@stud.mh-hannover.de; phone number: 617-352 1370.       

Legal Rights

You are not waiving any of your legal rights by agreeing to participate in this study.


The results of the study will be available here at the conclusion of the project.

Estimated date: November 2020

About the researcher

I am Caroline, a  yoga teacher and certified midwife from France, currently living in Boston. 
As part of my continuing education toward a Master of Science in Midwifery,  I am conducting this study on lumbopelvic pain and prenatal yoga.
Do not hesitate to contact me if you are a prenatal yoga teacher looking for more information before presenting this study to your students or if you are a potential participant and have more questions about this survey (Email address: Caroline.M.A.Lonfat@stud.mh-hannover.de).
I thank you very much for your interest in this research project.
With kind regards,