Validation of a Novel Incremental Step Test for Assessment of Cardiopulmonary Fitness and Ventilatory Thresholds in Adults (VALID-IST)
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
Undersøgelsestype
Undersøgelsestype
Tilmelding (Anslået)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
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Edinburgh, Det Forenede Kongerige, EH14 4AS
- Oriam Scotlant Performance Centre
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
Tager imod sunde frivillige
Beskrivelse
Inclusion Criteria:
- Healthy adults aged 18 to 55 years.
- Body mass index between 18.5 and 29.9 kg/m².
- Non-smoker.
- No known cardiovascular, respiratory, metabolic, neurological, or musculoskeletal conditions that would contraindicate maximal exercise testing.
- Able to provide written informed consent.
- Willing and able to complete one Cardiopulmonary Exercise Test and two Incremental Step Test sessions.
Exclusion Criteria:
- Age younger than 18 years or older than 55 years.
- Body mass index below 18.5 kg/m² or above 29.9 kg/m².
- Current smoker or use of nicotine products.
- Known cardiovascular, respiratory, metabolic, neurological, or musculoskeletal conditions that may affect exercise performance or make maximal exercise testing unsafe.
- Any contraindication to maximal exercise testing according to established exercise testing guidelines.
- Use of medications known to significantly affect cardiovascular, respiratory, or metabolic responses to exercise.
- Current injury, illness, or infection that may limit participation in exercise testing.
- Pregnancy.
- Inability to provide informed consent.
Inability to complete study procedures or attend all required study visits.
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Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Diagnostisk
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
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Eksperimentel: Incremental Step Test Validation Protocol
Participants will complete one laboratory-based Cardiopulmonary Exercise Test followed by two Incremental Step Test sessions conducted on separate visits.
The first visit will include screening, anthropometric measurements, and a maximal incremental CPET on an electronically braked cycle ergometer using an individualised ramp protocol set at 25 W/min for males and 20 W/min for females, after 3 minutes of unloaded cycling.
The second and third visits will involve two repeated incremental step tests on a standardised 25 cm step, with cadence starting at 20 beats per minute and increasing by 4 beats per minute every 20 seconds until volitional exhaustion.
The CPET will be terminated if participants could not maintain a cadence of at least 60 rpm, and the step test will be terminated if participants could not maintain the prescribed stepping rhythm for 15 consecutive seconds.
Exercise ECG, continuous heart rate, and breath-by-breath gas exchange will be recorded during all exercise tests.
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A maximal incremental exercise test performed on a cycle ergometer with continuous breath-by-breath gas exchange and heart rate monitoring to assess cardiorespiratory fitness and physiological response
A progressive step test using a standardised 25 cm step platform.
Participants will complete a 3-minute warm-up at 20 beats per minute before cadence increases by 4 beats per minute every 20 seconds until volitional exhaustion or predefined termination criteria are reached.
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Between-method agreement in oxygen uptake at Anaerobic Threshold (AT)
Tidsramme: Baseline (Day 1-CPET) and IST assessments at Visits 2 and 3, scheduled at 3-7-day intervals.
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Agreement between the Incremental Step Test and the established laboratory-based cycle ergometer Cardiopulmonary Exercise Test comparator for oxygen uptake at Anaerobic Threshold (mL/min), will be assessed using intraclass correlation coefficients and Bland-Altman analysis.
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Baseline (Day 1-CPET) and IST assessments at Visits 2 and 3, scheduled at 3-7-day intervals.
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Between-method agreement in oxygen uptake at Respiratory Compensation Point (RCP)
Tidsramme: Baseline (Day 1-CPET) and IST assessments at Visits 2 and 3, scheduled at 3-7-day intervals.
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Agreement between the Incremental Step Test and the established laboratory-based cycle ergometer Cardiopulmonary Exercise Test comparator for oxygen uptake at Respiratory Compensation point / Ventilatory Threshold 2 (mL/min), will be assessed using intraclass correlation coefficients and Bland-Altman analysis.
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Baseline (Day 1-CPET) and IST assessments at Visits 2 and 3, scheduled at 3-7-day intervals.
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Between-method agreement in Peak Oxygen Uptake (VO2peak)
Tidsramme: Baseline (Day 1-CPET) and IST assessments at Visits 2 and 3, scheduled at 3-7-day intervals.
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Peak oxygen uptake will be defined as the highest 30-second rolling average value recorded prior to test termination.
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Baseline (Day 1-CPET) and IST assessments at Visits 2 and 3, scheduled at 3-7-day intervals.
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
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Test-retest reliability of oxygen uptake at Anaerobic Threshold (AT)
Tidsramme: (Day 3-IST Visit 2) and IST Visit 3, scheduled 3-7 days apart.
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Test-retest reliability of oxygen uptake at AT (mL/min) derived from the Incremental Step Test (IST) between the first and second IST visits.
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(Day 3-IST Visit 2) and IST Visit 3, scheduled 3-7 days apart.
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Test-retest reliability of oxygen uptake at Respiratory compensation point (RCP)
Tidsramme: (Day 3-IST Visit 2) and IST Visit 3, scheduled 3-7 days apart.
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Test-retest reliability of oxygen uptake at RCP (mL/min) derived from the Incremental Step Test (IST) between the first and second IST visits.
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(Day 3-IST Visit 2) and IST Visit 3, scheduled 3-7 days apart.
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: David King, BSc, MSc, PhD, Heriot-Watt University
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Anslået)
Primær færdiggørelse
Studieafslutning (Anslået)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- Ref: 2025-12928-16897
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
IPD-planbeskrivelse
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
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