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During the exercise intervention "Death by Squats", which compasses body weight squats until maximum exertion, 25-30 subjects shall be tested for heart rate, the oxygen saturation of the vastus medialis and the triceps, resting and at maximum exertion blood lactate, as well as the rate of perceived exertion on the borg scale. At the end, all should indicate their primary reason for stopping (local fatigue, systemic fatigue, time constraints, motivational deficit).
Subjects in this study will be measured while they are engaged in an exercise protocol until maximum exertion, each in groups of three persons. The overall duration of the study is planned from April 2023 (start of recruitment) until December 2024 (finalization of data acquisition and analysis).
Subjects are executing a CrossFit workout which is planned as follows: Every minute, participants have to perform a given number of Airsquats (bodyweight squat). The first minute starts off with 10 repetitions, the remaining time can be used as a break. In minute two, 12 repetitions have to be done, in minute three 14 repetition, and so on. The subjects stick to this protocol until maximum exertion, in other words, until they are no longer able to execute the given repetitions within the actual minute. During the workout, heart rate is tracked by a 'Polar' chest strap, and the oxygen saturation of the vastus medialis and the triceps are measured using the 'Moxy' muscle oxygen monitor. Further, at rest and at maximum exertion, a blood lactate sample is taken (EKF lactate scout). Subjects rate their perceived exertion on the borg scale after quitting and indicate their primary reason for stopping (local fatigue in legs, systemic fatigue, time constraints).
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Death by Airsquat Exercise | All participants follow the exercise protocol, based on the "every minute on the minute" principle: Starting off with 10 body weight squats in the first minute (after completion, the remaining seconds can be always be used as a break). In minute two, 12 squats have to be completed. In minute three, 14 squats, and so forth. Until maximum exertion is reached and/or until the number of squats within 60 seconds can not be increased further. Every individual stops at his/her performance limit |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Death by Airsquat | Diagnostic Test | Increasing number of squats have to be completed every minute (EMOM principle). |
|
| Measure | Description | Time Frame |
|---|---|---|
| Local and systemic SmO2 curve | From the start of the exercise intervention until individual exhaustion (expected between 15 to 30 minutes), with SmOâ‚‚ continuously recorded during exercise and final measurement taken immediately upon exhaustion. |
| Measure | Description | Time Frame |
|---|---|---|
| Type of sports practiced | Questionnaire administered within 5 minutes after test completion to assess type of sports practiced. |
| Measure | Description | Time Frame |
|---|---|---|
| Anthropometric parameters will be assessed | The following anthropometric parameters will be assessed:
| Anthropometric measurements will be taken immediately after the completion of the exercise intervention (expected between 15 to 30 minutes after the start of exercise). |
Inclusion Criteria:
Exclusion Criteria:
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Male and female participants of 18 years and older, that are performing a CrossFit class with the EMOM workout "Death by Airsquat".
| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Annette Schmidt, Prof | Contact | +49 89 6004 4412 | annette.schmidt@unibw.de | |
| Jennifer Schlie, M.Sc. | Contact | +49 89 6004 4774 | jennifer.schlie@unibw.de |
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of the Bundeswehr Munich | Recruiting | Munich | Bavaria | 85577 | Germany |
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| ID | Term |
|---|---|
| D005221 | Fatigue |
| ID | Term |
|---|---|
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
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| Blood lactate concentration at rest and post-exercise | At rest (prior to exercise) and immediately upon individual exhaustion (expected between 15 to 30 minutes after the start of exercise). Additional post-exercise measurements at 2, 5, and 10 minutes if applicable. |