此页面是自动翻译的，不保证翻译的准确性。请参阅 英文版 对于源文本。

Hydration and Exercise Performance in Cycling

2018年10月11日 更新者：University of Exeter

How Does Altering the Composition of Ingested Fluids Affect Hydration Status Whilst Cycling?

This study will evaluate the effects manipulating ingested fluids can have on hydration status and cycling performance. There will be 4 different conditions.

研究概览

地位

完全的

条件

干预/治疗

详细说明

Being dehydrated can decrease endurance exercise performance. The investigators wish to test which of three drinks is most effective at re-hydrating cyclists and if this affects performance. Subjects will undertake 4 tests: once dehydrated, once hydrated with water, once hydrated with a sports-specific drink, and once with an altered sports drink. Blood samples will be taken and expired gasses will be sampled at various time points throughout the tests for later analysis. A small amount of labelled water will be consumed with each drink, a technique which will allow us to quantify the absorption of each of the drinks.

研究类型

介入性

注册 (实际的)

15

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
    • Devon
      • Exeter、Devon、英国、EX1 2LU
        • School of Sports and Health Sciences

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

18年 至 50年 (成人)

接受健康志愿者

是的

有资格学习的性别

全部

描述

Inclusion Criteria:

  • Highly trained cyclists (vo2max >55 ml/kg/min, PPO (peak power output) > 4 w/kg)
  • Training at least 4 times a week
  • Females must be taking an oral contraceptive, or using the contraceptive implant

Exclusion Criteria:

  • Recent history of musculoskeletal injury
  • Diagnosed cardiovascular disease
  • Regular use of nutritional supplements that may interfere with the protocol

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：治疗
  • 分配：随机化
  • 介入模型：交叉作业
  • 屏蔽：双倍的

武器和干预

参与者组/臂
干预/治疗
实验性的：Dehydrated
90 minutes cycling, without the ingestion of any fluids, followed by a 15 minute cycling time trial test
其他：Dehydrated
N/A: see arm description
实验性的：Hypotonic
90 minutes cycling, with the ingestion of six 250 ml carbohydrate (6g sucrose, 3g glucose) drinks, followed by a 15 minute cycling time trial test
膳食补充剂：Hypotonic
N/A: see arm description
实验性的：Isotonic
90 minutes cycling, with the ingestion of six 250 ml carbohydrate (6g glucose, 3g fructose) drinks, followed by a 15 minute cycling time trial test
膳食补充剂：Isotonic
N/A: see arm description
实验性的：Placebo
90 minutes cycling, with the ingestion of six 250 ml taste-matched water drinks, followed by a 15 minute cycling time trial test
膳食补充剂：安慰剂
N/A：见手臂描述

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
Absorption of fluid through the gut
大体时间：To begin 10 minutes after the completion of the 90 minute steady-state cycle
Absorption of drinks through the gut will be measured using 2 boluses of deuterated water. This will be consumed alongside 2 of the drinks, and blood samples will be used to quantify enrichment. Total body water calculations are required to provide corrections in equations related to D2O. H218O will be consumed in order to quantify total body water: this will be provided in a single bolus before each trial.
To begin 10 minutes after the completion of the 90 minute steady-state cycle

次要结果测量

结果测量
措施说明
大体时间
Work done (kJ) during 15 minute cycling time-trial
大体时间：Throughout the 90 minute steady-state cycle & the 15 minute time trial.
Subjects will perform a cycle ergometer protocol that has been shown to be reproducible in athletes. Subjects will complete the time trial on a Lode Excalibur cycling ergometer. Software linked to this software will record work done and power output.
Throughout the 90 minute steady-state cycle & the 15 minute time trial.

其他结果措施

结果测量
措施说明
大体时间
Substrate utilisation
大体时间：Throughout the 90 minute steady-state cycle
Substrate utilisation will be calculated from data collected through a metabolic cart and its software. It will be measured during the 90-minute steady-state cycle for 4 periods of 3 minutes. Carbohydrate and lipid oxidation rates will be calculated using equations by Jeukendrup & Wallis (2005).
Throughout the 90 minute steady-state cycle
Plasma metabolites
大体时间：Throughout the 90 minute steady-state cycle and time-trial
A cannula will be used to draw blood from subjects at several time points. Whole blood samples will be analysed immediately for plasma glucose, plasma lactate, haemoglobin content, haematocrit and plasma volume. Remaining whole blood will be centrifuged immediately and its plasma split into aliquots and stored in a -20°C freezer. At the end of the trial, plasma samples will be moved to a -80°C freezer for later analysis for sodium, glycerol, and NEFA.
Throughout the 90 minute steady-state cycle and time-trial
Heart rate
大体时间：Throughout the 90 minute steady-state cycle and time-trial
Heart rate will be measured throughout with the use of a heart rate monitor.
Throughout the 90 minute steady-state cycle and time-trial
RPE (rating of perceived exertion)
大体时间：Throughout the 90 minute steady-state cycle and time-trial
RPE will be measured using the Borg Scale.
Throughout the 90 minute steady-state cycle and time-trial
Core body temperature
大体时间：Throughout the 90 minute steady-state cycle and time-trial
Core temperature will be measured throughout with the use of an ingestible core-body temperature pill (HQ Inc, FL, USA).
Throughout the 90 minute steady-state cycle and time-trial

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

University of Exeter

调查人员

  • 首席研究员：Andrew D Davenport, MSc、The University of Exeter

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)

2017年9月11日

初级完成 (实际的)

2018年6月1日

研究完成 (实际的)

2018年6月1日

研究注册日期

首次提交

2017年9月13日

首先提交符合 QC 标准的

2017年10月2日

首次发布 (实际的)

2017年10月6日

研究记录更新

最后更新发布 (实际的)

2018年10月12日

上次提交的符合 QC 标准的更新

2018年10月11日

最后验证

2018年10月1日

更多信息

与本研究相关的术语

其他研究编号

  • 170614/A/01

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.

安慰剂的临床试验

搜索类似试验

赞助者和合作者

医疗条件

药物干预

CROs by country

CROs in Ghana

条件

罕见疾病

药物干预

膳食补充剂

赞助者/合作者

地点

3
订阅