The Body's Response to Food Intake in Trained, Older Adults

September 23, 2013 updated by: Wayne Campbell, Purdue University
The purpose of this research study is to determine the effects of food supplements and strength training on appetite, the amount of energy expended, and body composition.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
50

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Indiana
      • West Lafayette, Indiana, United States, 47907
        • Purdue University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

60 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

All subjects must meet the following eligibility criteria:

  • Age range: 60 years and older
  • Body mass index between 20-29 kg/m2
  • Weight stable (< 2 kg weight change within last 6 months)
  • Non-smoking
  • Constant habitual activity patterns within last 3 months
  • Clinically normal blood profiles (specifically, normal liver and kidney function; normal complete blood count (non-anemic); fasting blood glucose <110 mg/dl)
  • Not taking medications known to influence appetite or metabolism
  • Non-diabetic
  • Confirmation of acceptability of eating the study test foods (solids and fluids)

Trained subjects (Recruiting 36; N-25) must meet the following eligibility criteria:

  • Resistive exercise training (≥ 2 times a week) based on reported physical activity levels (questionnaire)
  • Active fitness level (≥ 2, 30-minute aerobic exercise sessions/week)

Sedentary subjects (Recruiting 36; N-25) must meet the following eligibility criteria:

  • Resistive exercise training (≤ 1 time a week) based on reported physical activity levels (questionnaire)
  • Active fitness level (≤ 2, 30-minute aerobic exercise sessions/week)

Exclusion Criteria:

All subjects will be excluded based on the following exclusionary criteria:

  • Age: <60 years
  • Body mass index: outside of the 20-29 kg/m2 range
  • Gained or lost > 4.5 kg within the last 6 months
  • Smoker (currently or within the last year)
  • Intermittently been involved in a diet and/or exercise program within the last 3 months
  • Clinically abnormal blood profiles as identified by our study physician, Arthur Rosen, MD
  • Taking medications (currently or within the last 3 months) known to influence appetite or metabolism
  • Abnormal heart function (interpreted by a cardiologist) and assessed (for study exclusion) by our study physician, Arthur Rosen, MD
  • Clinically diagnosed as diabetic
  • Study foods are found to be unacceptable for consumption by the subject
  • Clinically diagnosed osteoporosis

Trained subjects will be excluded based on the following exclusionary criteria:

  • Did not perform resistive exercise training (currently or within the last 3 months) based on reported physical activity levels (questionnaire)
  • Perform ≤ 1, 30-minute aerobic exercise session/week (currently or within the last 3 months) based on physical activity levels questionnaire)

Sedentary subjects will be excluded based on the following exclusionary criteria:

  • Performed resistive exercise training (currently or within the last 3 months) based on reported physical activity levels (questionnaire)
  • Perform > 2, 30-minute aerobic exercise sessions/week (currently or within the last 3 months) based on physical activity levels questionnaire)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: 1
participants continue current exercise and take liquid supplement
Dietary supplement: Liquid Supplements
Liquid supplement that provides 12.5% of the subjects total energy requirement.
Experimental: 2
Participants continue current exercise and take solid supplement
Dietary supplement: Solid Supplement
Solid supplement that provides 12.5% of the subjects total energy requirement.
Experimental: 3
Participants continue current sedentary behavior and take liquid supplements
Dietary supplement: Liquid Supplements
Liquid supplement that provides 12.5% of the subjects total energy requirement.
Experimental: 4
Participants continue current sedentary behavior and take solid supplements
Dietary supplement: Solid Supplement
Solid supplement that provides 12.5% of the subjects total energy requirement.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Quantify the acute effects of fluid and solid foods on post-prandial (post-meal) appetite and food intake at the next eating occasion in trained and untrained, elderly people.
Time Frame: 6 weeks
6 weeks

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Time Frame
Quantify the contribution of selected satiety factors (glucose, insulin, CCK, ghrelin, and GLP-1) and gastrointestinal transit time, to the differential appetitive responses to fluid versus solid foods in trained and untrained, elderly people
Time Frame: 6 weeks
6 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Purdue University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
September 1, 2006

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
August 1, 2007

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
May 1, 2008

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 25, 2008

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 25, 2008

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
November 26, 2008

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 24, 2013

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 23, 2013

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
March 1, 2010

More Information

Terms related to this study

Keywords

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 0607004184
  • NIH R01 AG021911-0102

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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