Local and Systemic Oxygen Saturation During 'Death by Squats' Exercise

NCT ID: NCT06884644

Last Updated: 2025-03-19

Basic Information

• Recruitment Status: RECRUITING
• Total Enrollment: 100 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2025-02-08
• Study Completion Date: 2025-12-31

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).

Conditions

Oxygen Saturation; Fatigue; Anaerobic Threshold; Quadriceps Muscle

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Study Groups

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

Death by Airsquat

Intervention Type: DIAGNOSTIC_TEST

Increasing number of squats have to be completed every minute (EMOM principle).

Interventions

Death by Airsquat

Increasing number of squats have to be completed every minute (EMOM principle).

Intervention Type: DIAGNOSTIC_TEST

Eligibility Criteria

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)

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Bundeswehr University Munich

OTHER

Sponsor Role: lead

Responsible Party

Annette Schmidt, PhD

Prof. Dr. Annette Schmidt

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

University of the Bundeswehr Munich

Munich, Bavaria, Germany

Site Status: RECRUITING

Countries

Germany

Central Contacts

Annette Schmidt, Prof

Role: CONTACT

annette.schmidt@unibw.de

+49 89 6004 4412

Jennifer Schlie, M.Sc.

Role: CONTACT

jennifer.schlie@unibw.de

+49 89 6004 4774

Facility Contacts

Petra Neudorfer

Role: primary

petra.neudorfer@unibw.de

+49 89 6004 4181

Other Identifiers

DBS23

Identifier Type: -

Identifier Source: org_study_id