Rowing Ergometer Reliability in Jiu Jitsu Practitioners

The purpose of this study is to assess the reliability of performance variables during a repeated interval anaerobic rowing protocol. Additionally, we will evaluate potential performance differences between jiu jitsu and non-jiu jitsu practitioners for measures such as handgrip strength, countermovement jump variables, and isometric mid-thigh pull variables.

This study will consist of two parts. All participants will complete part 1 consisting of 4 visits. Jiu jitsu practitioners will be invited back for part 2 consisting of 1 additional visit. Each visit will take approximately 30-60 minutes to complete. Visit 1 will consist of an informed consent and completion of three questionnaires. Visit 2 will consist of anthropometrics (height, weight, and body composition), test familiarization, and a 6-minute rowing test. Visit 3 and 4 will consist of the repeated interval anaerobic rowing protocol with assessments of handgrip strength, countermovement jump variables, and isometric mid-thigh pull variables before and immediately after the protocol. Jiu jitsu practitioners will be invited back for a 5th visit consisting of the Jiu Jitsu Anaerobic Performance Test with assessments of handgrip strength, countermovement jump variables, and isometric mid-thigh pull variables before and immediately after the test.

Visits 2-5 will be separated by at least 48 hours.

Inclusion Qualifications:

Part 1

Male between the ages of 18-45 years old
Healthy as determined by the PAR-Q+
At least recreationally active (3 or more days a week)
English speaking

Part 2

Male between the ages of 18-45 years old
Healthy as determined by the PAR-Q+
English speaking
At least recreationally active (3 or more days a week)
Jiu jitsu practitioners with greater than 2 years of jiu jitsu experience OR holding a blue belt or higher in jiu jitsu

Exclusion Qualifications:

You may not participate in this research opportunity if any of the following applies to you:

Physical limitations that prevent individuals from completing all testing procedures.
Concerns regarding health status indicated on the PAR-Q+.
Jiu jitsu experience of less than two years and below a blue belt
Non-binary gender identity or gender identity not consistent with biological sex
Use of hormone therapy within the past 6 months