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Validation of a Novel Incremental Step Test for Assessment of Cardiopulmonary Fitness and Ventilatory Thresholds in Adults (VALID-IST)

2026年9月14日 更新者：David King、Heriot-Watt University
The purpose of this single-group diagnostic validation and test-retest reliability study is to determine whether a novel Incremental Step Test (IST) can accurately assess cardiorespiratory fitness and ventilatory thresholds in healthy adults compared with an established laboratory-based cycle ergometer Cardiopulmonary Exercise Test (CPET). The main questions are whether the step test can elicit reliable physiological responses sufficient to identify the anaerobic threshold and respiratory compensation point, and whether it produces reproducible results when repeated under standardised conditions. The study will compare the incremental step test (IST) with CPET to assess whether the IST provides similar peak and submaximal physiological measures and agreement with CPET comparator. Participants will complete three laboratory exercise tests across separate visits: one maximal CPET on a cycle ergometer, followed by two repeated ISTs performed on a 25 cm step board following the audio metronome.

研究概览

地位

邀请报名

条件

干预/治疗

详细说明

Participants will attend three laboratory visits separated by at least 3 days and conducted at similar times of the day. The first visit will include screening, anthropometric assessment, and a maximal CPET on an electronically braked cycle ergometer using a ramp protocol of 25 W/min for males and 20 W/min for females. Participants will complete 3 minutes of unloaded cycling followed by incremental protocol while maintaining the cadence at least 60 rpm, and the test will be terminated if they can no longer can sustain this cadence. Following CPET, participants will complete a 6-minute familiarisation session to practise the stepping activity, including the up-up-down-down stepping technique and alternation of the leading leg every 2 minutes. The second and third visits will involve repeated IST trials performed on 25 cm step board, with cadence progressed from 20 beats per minute and increased by 4 beats per minute every 20 seconds until volitional exhaustion. The IST will be terminated if the participant is unable to maintain the prescribed stepping rhythm for more than 15 seconds. Continuous breath-by-breath gas exchange, ECG, and heart rate monitoring will be used during testing to characterise peak performance and ventilatory threshold responses. Agreement between the step test and CPET, as well as test-retest reproducibility of the IST, will be evaluated to determine whether the new protocol could support more individualised exercise prescription in stepping-based activities.

研究类型

介入性

注册 (估计的)

30

阶段

  • 不适用

联系人和位置

本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。

学习地点

  • 英国
      • Edinburgh、英国、EH14 4AS
        • Oriam Scotlant Performance Centre

参与标准

研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

  • 成人

接受健康志愿者

是的

描述

Inclusion Criteria:

  1. Healthy adults aged 18 to 55 years.
  2. Body mass index between 18.5 and 29.9 kg/m².
  3. Non-smoker.
  4. No known cardiovascular, respiratory, metabolic, neurological, or musculoskeletal conditions that would contraindicate maximal exercise testing.
  5. Able to provide written informed consent.
  6. Willing and able to complete one Cardiopulmonary Exercise Test and two Incremental Step Test sessions.

Exclusion Criteria:

  1. Age younger than 18 years or older than 55 years.
  2. Body mass index below 18.5 kg/m² or above 29.9 kg/m².
  3. Current smoker or use of nicotine products.
  4. Known cardiovascular, respiratory, metabolic, neurological, or musculoskeletal conditions that may affect exercise performance or make maximal exercise testing unsafe.
  5. Any contraindication to maximal exercise testing according to established exercise testing guidelines.
  6. Use of medications known to significantly affect cardiovascular, respiratory, or metabolic responses to exercise.
  7. Current injury, illness, or infection that may limit participation in exercise testing.
  8. Pregnancy.
  9. Inability to provide informed consent.

  10. Inability to complete study procedures or attend all required study visits.

    -

学习计划

本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。

研究是如何设计的？

设计细节

  • 主要用途：诊断
  • 分配：不适用
  • 介入模型：单组作业
  • 屏蔽：无（打开标签）

武器和干预

参与者组/臂
干预/治疗
实验性的：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.
诊断测试：Cardiopulmonary Exercise Test
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
诊断测试：Incremental Step Test
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.

研究衡量的是什么？

主要结果指标

结果测量
措施说明
大体时间
Between-method agreement in oxygen uptake at Anaerobic Threshold (AT)
大体时间：Baseline (Day 1-CPET) and IST assessments at Visits 2 and 3, scheduled at 3-7-day intervals.
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.
Baseline (Day 1-CPET) and IST assessments at Visits 2 and 3, scheduled at 3-7-day intervals.
Between-method agreement in oxygen uptake at Respiratory Compensation Point (RCP)
大体时间：Baseline (Day 1-CPET) and IST assessments at Visits 2 and 3, scheduled at 3-7-day intervals.
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.
Baseline (Day 1-CPET) and IST assessments at Visits 2 and 3, scheduled at 3-7-day intervals.
Between-method agreement in Peak Oxygen Uptake (VO2peak)
大体时间：Baseline (Day 1-CPET) and IST assessments at Visits 2 and 3, scheduled at 3-7-day intervals.
Peak oxygen uptake will be defined as the highest 30-second rolling average value recorded prior to test termination.
Baseline (Day 1-CPET) and IST assessments at Visits 2 and 3, scheduled at 3-7-day intervals.

次要结果测量

结果测量
措施说明
大体时间
Test-retest reliability of oxygen uptake at Anaerobic Threshold (AT)
大体时间：(Day 3-IST Visit 2) and IST Visit 3, scheduled 3-7 days apart.
Test-retest reliability of oxygen uptake at AT (mL/min) derived from the Incremental Step Test (IST) between the first and second IST visits.
(Day 3-IST Visit 2) and IST Visit 3, scheduled 3-7 days apart.
Test-retest reliability of oxygen uptake at Respiratory compensation point (RCP)
大体时间：(Day 3-IST Visit 2) and IST Visit 3, scheduled 3-7 days apart.
Test-retest reliability of oxygen uptake at RCP (mL/min) derived from the Incremental Step Test (IST) between the first and second IST visits.
(Day 3-IST Visit 2) and IST Visit 3, scheduled 3-7 days apart.

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

Heriot-Watt University

调查人员

  • 首席研究员：David King, BSc, MSc, PhD、Heriot-Watt University

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始 (实际的)

2026年7月20日

初级完成 (估计的)

2026年9月30日

研究完成 (估计的)

2026年10月30日

研究注册日期

首次提交

2026年9月8日

首先提交符合 QC 标准的

2026年9月14日

首次发布 (实际的)

2026年9月18日

研究记录更新

最后更新发布 (实际的)

2026年9月18日

上次提交的符合 QC 标准的更新

2026年9月14日

最后验证

2026年9月1日

更多信息

与本研究相关的术语

关键字

其他相关的 MeSH 术语

其他研究编号

  • Ref: 2025-12928-16897

计划个人参与者数据 (IPD)

计划共享个人参与者数据 (IPD)？

不

IPD 计划说明

No individual participant data will be shared publicly. The study will report findings using aggregated and de-identified data. Individual participant data will be retained securely by the research team in accordance with Heriot-Watt University research governance and data protection requirements.

药物和器械信息、研究文件

研究美国 FDA 监管的药品

不

研究美国 FDA 监管的设备产品

不

此信息直接从 clinicaltrials.gov 网站检索，没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求，请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改，我们的网站上也会自动更新.

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