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Respiratory and Exercise Responses by Body Roundness Index in Obesity

12 maggio 2026 aggiornato da: Buket AKINCI, Biruni University

Evaluation of Respiratory Performance and Exercise Responses According to Body Roundness Index in Individuals With Obesity

This observational study aims to evaluate respiratory performance and exercise responses according to Body Roundness Index (BRI) in individuals with obesity. Participants will undergo anthropometric and body composition assessments, respiratory muscle strength testing, pulmonary function evaluation, and a six-minute walk test. Exercise-related ventilatory responses, dyspnea, fatigue perception, oxygen saturation, and heart rate responses will also be assessed. The study seeks to investigate the relationship between BRI and cardiopulmonary performance and to determine whether BRI may serve as a useful indicator of obesity-related functional limitations and exercise capacity.

Panoramica dello studio

Stato

Non ancora reclutamento

Condizioni

Intervento / Trattamento

Tipo di studio

Osservativo

Iscrizione (Stimato)

120

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Contatto studio

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

  • Adulto

Accetta volontari sani

Sì

Metodo di campionamento

Campione non probabilistico

Popolazione di studio

The study population will consist of adults with obesity between 25 and 60 years of age with a body mass index (BMI) ≥ 30 kg/m² according to the World Health Organization classification. Participants will be recruited on a voluntary basis and will undergo anthropometric, respiratory, and exercise capacity assessments.

Descrizione

Inclusion Criteria:

  • Individuals between 25 and 60 years of age
  • Individuals with a body mass index (BMI) ≥ 30 kg/m² according to the World Health Organization (WHO) classification
  • Individuals who voluntarily agree to participate in the study

Exclusion Criteria:

  • Individuals with a Charlson Comorbidity Index (CCI) score of 3 or higher
  • Individuals with uncontrolled arrhythmia, hypertension, heart failure, diabetes mellitus, or unstable angina pectoris
  • Individuals with cooperation difficulties, orthopedic disorders, or neurological problems that may interfere with assessment procedures
  • Individuals with a history of lower extremity injury or surgery within the last six months
  • Individuals diagnosed with diabetes mellitus and presenting complications such as nephropathy, retinopathy, or neuropathy
  • Individuals with concomitant chronic respiratory disease
  • Individuals with acute infection
  • Individuals with middle ear pathologies (e.g., tympanic membrane rupture or otitis)
  • Individuals with a history of spontaneous or trauma-related pneumothorax
  • Current smokers
  • Pregnant individuals
  • Individuals with a STOP-Bang score of 3 or higher
  • Individuals currently participating in a structured weight-loss diet program or receiving medical treatment for weight reduction during the assessment period
  • Individuals who underwent endoscopic intervention and/or bariatric surgery within the last year

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

Coorti e interventi

Gruppo / Coorte
Intervento / Trattamento
Individuals with obesity
Participants will not receive any therapeutic or experimental intervention; only observational and functional assessments will be performed.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Forced vital capacity (FVC)
Lasso di tempo: Day 1
The assessment will be performed in accordance with the American Thoracic Society (ATS) and European Respiratory Society (ERS) criteria. Assessments will be conducted in a seated position with back support. To prevent the risk of infection, disposable mouthpieces and filters will be used for each participant. Forced vital capacity (FVC) will be measured. Values will be recorded in liter and as percentage (%) of predicted values. Measurements will be repeated three times, and the best value meeting measurement standardization criteria will be recorded.
Day 1
Maximum Inspiratory Pressure (MIP)
Lasso di tempo: Day 1
Respiratory muscle strength assessment will be performed using an intraoral pressure measurement device (MicroRPM, Micro Medical, United Kingdom) in accordance with the American Thoracic Society (ATS) and European Respiratory Society (ERS) criteria (ATS/ERS, 2002). Measurements will be conducted in a seated position while wearing a nose clip. To prevent the risk of infection, disposable mouthpieces and filters will be used for each participant. For maximal inspiratory pressure (MIP) measurement, participants will perform a maximal inspiratory effort through the mouth for a few seconds. Measurements will be repeated three times, and the best value meeting standardization criteria will be recorded in cmH₂O.
Day 1
Forced Expiratory Volume in 1 second (FEV1)
Lasso di tempo: Day 1
The assessment will be performed in accordance with the American Thoracic Society (ATS) and European Respiratory Society (ERS) criteria. Assessments will be conducted in a seated position with back support. To prevent the risk of infection, disposable mouthpieces and filters will be used for each participant. FEV1 ratio will be measured. Values will be recorded percentage (%) of predicted values. Measurements will be repeated three times, and the best value meeting measurement standardization criteria will be recorded.
Day 1
FEV1/FVC ratio
Lasso di tempo: Day 1
The assessment will be performed in accordance with the American Thoracic Society (ATS) and European Respiratory Society (ERS) criteria. Assessments will be conducted in a seated position with back support. To prevent the risk of infection, disposable mouthpieces and filters will be used for each participant. FEV1/FVC ratio will be measured. Values will be recorded percentage (%) of predicted values. Measurements will be repeated three times, and the best value meeting measurement standardization criteria will be recorded.
Day 1
Maximal expiratory pressure (MEP)
Lasso di tempo: Day 1
Respiratory muscle strength assessment will be performed using an intraoral pressure measurement device (MicroRPM, Micro Medical, United Kingdom) in accordance with the American Thoracic Society (ATS) and European Respiratory Society (ERS) criteria (ATS/ERS, 2002). Measurements will be conducted in a seated position while wearing a nose clip. To prevent the risk of infection, disposable mouthpieces and filters will be used for each participant. For maximal expiratory pressure (MEP) measurement, a maximal expiratory effort will be performed for a few seconds, and the values will be recorded. Measurements will be repeated three times, and the best value meeting standardization criteria will be recorded in cmH₂O.
Day 1

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Exercise capacity
Lasso di tempo: Day 1
Exercise capacity will be evaluated using the Six-Minute Walk Test (6MWT) according to the American Thoracic Society (ATS) guidelines with the Spiropalm 6MWT device (COSMED, Italy) (ATS, 2002). Before the test, participants will rest for at least 10 minutes, and baseline measurements including heart rate, blood pressure, oxygen saturation, dyspnea, and leg fatigue will be recorded. The test will be performed in a 30-meter indoor corridor, and participants will be instructed to walk as fast as possible for six minutes. Total walking distance will be recorded in meters. Heart rate, oxygen saturation, dyspnea, and fatigue levels will be reassessed after the test.
Day 1
Ventilation (VE)
Lasso di tempo: Day 1
Ventilation (Unit of Measure: L/min) during the 6MWT will be assessed using the Spiropalm device.
Day 1
Body fat mass index (kg)
Lasso di tempo: Day 1
Body fat mass (kg) will be measured using Bioelectrical Impedance Analysis (BIA). Participants will be informed about the test protocol and instructed to fast for 8-12 hours before the assessment, arrive with an empty bladder, and avoid fluid intake, food consumption, and vigorous physical activity prior to the measurements. Assessments will be performed during daytime at a room temperature of 25°C. Participants will be measured while clothed and barefoot after removing their shoes, socks, and all metal accessories.
Day 1
Body Roundness Index
Lasso di tempo: Day 1
Body Roundness Index (BRI) will be calculated using waist circumference and height measurements according to the standardized BRI formula. The BRI is a continuous index with no fixed minimum or maximum value. Higher BRI values indicate greater body roundness and higher adiposity (worse outcome).
Day 1
Peak ventilation (VEpeak)
Lasso di tempo: Day 1
Peak ventilation (VEpeak) during the 6MWT will be assessed using the Spiropalm device.
Day 1
Peak breathing reserve (BRpeak)
Lasso di tempo: Day 1
Peak breathing reserve (BRpeak) (Unit of Measure: %) during the 6MWT will be assessed using the Spiropalm device.
Day 1
Inspiratory capacity (IC)
Lasso di tempo: Day 1
Inspiratory capacity (IC) during the 6MWT will be assessed using the Spiropalm device.
Day 1
Body muscle mass (kg)
Lasso di tempo: Day 1
Body muscle mass (kg) will be measured using Bioelectrical Impedance Analysis (BIA). Participants will be informed about the test protocol and instructed to fast for 8-12 hours before the assessment, arrive with an empty bladder, and avoid fluid intake, food consumption, and vigorous physical activity prior to the measurements. Assessments will be performed during daytime at a room temperature of 25°C. Participants will be measured while clothed and barefoot after removing their shoes, socks, and all metal accessories.
Day 1

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Stimato)

20 giugno 2026

Completamento primario (Stimato)

20 novembre 2026

Completamento dello studio (Stimato)

9 dicembre 2026

Date di iscrizione allo studio

Primo inviato

7 maggio 2026

Primo inviato che soddisfa i criteri di controllo qualità

12 maggio 2026

Primo Inserito (Effettivo)

19 maggio 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

19 maggio 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

12 maggio 2026

Ultimo verificato

1 maggio 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • Obesity1052026

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

SÌ

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .