Reliability and Validity of an Isoinertial Training Device

Why am I being invited to take part in a research study?
We invite you to take part in a research study because you

  • are a healthy male or female between the ages of 18-40 years old,
  • are currently participating in at least 150 minutes of combined physical activity per week,
  • are currently not pregnant,
  • are currently premenopausal,
  • are currently not taking any prescription or over the counter medications, and
  • are not currently using any ergogenic aids (performance enhancers) that the investigators think could potentially confound the results of the study; or are willing keep consumption of ergogenic aids consistent throughout the study duration,
  • are free from previous or current lower body injuries that the investigators think may limit your ability to do the assessments
  • Have no previous isoinertial training experience
  • are also willing to refrain from taking over 300mg of caffeine daily and
  • are willing to keep your consumption of caffeine consistent throughout the study duration, and
  • will refrain from vigorous activity that could result in muscle soreness at least 72 hours prior to visits 2-7.
  • Additionally, you have no chronic illnesses requiring ongoing medical attention.

Health status will be determined by completion of the Physical Activity Readiness Questionnaire, Medical Health History Questionnaire and Menstrual Status questionnaire (if applicable).

Why is this research being done?
The purpose of this study is to examine the reliability and validity of the Desmotec isoinertial training device for measuring isometric (no muscle movement) squat force and dynamic (muscle movement) squat force and power as well as to examine the minimum number of visits required to be familiarized with the device.

How long will the research last and what will I need to do?
We expect that you will be in this research study for approximately 9 hours over 7-9 weeks, or as long as it takes to complete seven visits. Your time in the study will depend on how many days you take between visits.

  • Today’s visit is for discussing study details and completing surveys to confirm your eligibility for the rest of the study and should take no more than 45 minutes.
  • Visit 2 will be a familiarization visit, will occur at least 24 hours after visit 1 and will take approximately 115 minutes to complete.
  • Visits 3-6 will be testing sessions and each will take approximately 75 minutes to complete.
  • Visit 7 will be the final testing session and will take approximately 90 minutes to complete.
  • Visit 3 will occur at least 7 days but no more than 9 days after visit 2, and visits 3-7 will be separated by at least 7 but no more than 9 days. You will be asked not to change the consumption of caffeine or any ergogenic aids during the course of the study. Additionally, you will be asked to refrain from any vigorous activity that could result in leg muscle soreness at least 72 hours prior to visits 2-7.

You will be asked to complete one familiarization day and five testing sessions. These are described later in this consent form under “Detailed information – What happens if I say yes.  More detailed information about the risks of this study can be found under “Is there any way being in this study could be bad for me? (Detailed Risks)

Will being in this study help me in any way?
We cannot promise any benefits to you or others from your taking part in this research. However, possible benefits include gaining familiarity with dynamic movement assessments, MVIC assessments, and an isoinertial training device. This may be useful for your own future training.

What happens if I do not want to be in this research?
Your participation in this study is voluntary. You are free to withdraw your consent and discontinue participation in this study at any time without prejudice or penalty. Your decision to participate or not participate in this study will in no way affect your continued enrollment, grades, employment or your relationship with UCF or the individuals who may have an interest in this study.

Your alternative to participating in this research study is to not participate.

Inclusion Qualifications:

  • Male or female between the ages of 18-40
  • Healthy, and ready for physical activity as determined by the PAR-Q+, MHQ, and if applicable, MSQ.
  • Participants will be required to be recreationally active (defined according to ACSM standards of at least 150 minutes exercise per week).
  • Participants must be willing abstain from dietary supplementation that are viewed by study investigators to confound the outcomes of the study (e.g., Creatine) or if actively supplementing, to keep intake consistent throughout the duration of the study.
  • Consuming less that 300mg of caffeine daily
  • Free from any current lower body injuries
  • Must have no previous isoinertial training
  • Willing to abstain from lower body resistance training for at least 72 hours prior to each visit

Exclusion Qualifications:

You may not participate in this research opportunity if any of the following applies to you:
  • Not currently participating in at least 150 minutes of physical exercise each week
  • Currently taking any performance enhancing drugs
  • Have any chronic illness that requires medical care
  • Habitually consume more than 300mg of caffeine daily
  • Not regularly having periods (if applicable)
  • Have previous experience with lower body isoinertial training

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UCF IRB#: 00004638
PI: Adam Wells
IRB Expiration March 2, 2023
Please consider subscribing to get notified about future research participation opportunities
Recruitment End Date:
March 2, 2023
Education Complex and Gym
4000 Central Florida Blvd
Orlando, FL 32816
Time Commitment:
Number of visits: 7
Expected time per visit: 60 minutes
Point of Contact:
Trevor Dufner
Faculty Advisors:
Adam J. Wells
Associated Units:
Related Tags:
Short URL:

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