Anaerobic Threshold, Fatigue, Oxygen Saturation, Quadriceps Muscle
Conditions
Brief summary
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).
Detailed description
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).
Interventions
DIAGNOSTIC_TESTDeath by Airsquat
Increasing number of squats have to be completed every minute (EMOM principle).
Sponsors
Bundeswehr University Munich
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* being moderately to severely physically active al least 2 hours/week (all types of sport are eligible)
Exclusion criteria
* akute infections, musculoskeletal injuries * chronic cardiovascular or pulmonary diseases (in case of uncertainty, we recommend appraisal from medical personnel)
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Local and systemic SmO2 curve | From the start of the exercise intervention until individual exhaustion (expected between 15 to 30 minutes), with SmO₂ continuously recorded during exercise and final measurement taken immediately upon exhaustion. |
Secondary
| Measure | Time frame |
|---|---|
| Type of sports practiced | Questionnaire administered within 5 minutes after test completion to assess type of sports practiced. |
Other
| Measure | Time frame | Description |
|---|---|---|
| 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). | The following anthropometric parameters will be assessed: * body mass (kg) * body height (cm) * BMI (kg/m², calculated from body mass and height) * limb circumference (cm) * skinfold thickness (mm) |
| 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. | — |
Countries
Germany
Contacts
Primary ContactAnnette Schmidt, Prof
Backup ContactJennifer Schlie, M.Sc.
Outcome results
None listed