Lean Muscle Function (LEAN)
10. marts 2017 opdateret af: Barbara Nicklas, PhD, Wake Forest University
Obesity and Muscle Function Pilot Study
This pilot study is designed to determine the relationship between intra-myocellular lipids and muscle contractility in fibers from obese and non-obese older adults.
Obese participants are being recruited for an on-going weight loss intervention study and this application seeks approval to recruit and enroll a lean comparison group of non-obese older adults.
The primary goal of this study is to characterize the contractile properties of single muscle fibers and whole muscle in healthy, non-obese individuals under the same recording conditions the investigators used for the obese population to begin to determine whether fat infiltration accounts for diminished force.
Studieoversigt
Status
Afsluttet
Betingelser
Undersøgelsestype
Observationel
Tilmelding (Faktiske)
24
Kontakter og lokationer
Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.
Studiesteder
-
-
North Carolina
-
Winston Salem, North Carolina, Forenede Stater, 27157
- Wake Forest University Health Sciences
-
-
Deltagelseskriterier
Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.
Berettigelseskriterier
Aldre berettiget til at studere
65 år til 75 år (Ældre voksen)
Tager imod sunde frivillige
Ja
Køn, der er berettiget til at studere
Alle
Prøveudtagningsmetode
Sandsynlighedsprøve
Studiebefolkning
20 sedentary, normal-weight (BMI= 18-24 kg/m2) older (65-75 yrs) men and women (n=10 each)
Beskrivelse
Inclusion Criteria:
- Age=65-75 years
- BMI=18-24 kg/m2
- No resistance training for past 6 months
- Normal cognitive function (MMSE >24)
- No contraindications for participation in weight loss or weight lifting exercise including severe arthritis or musculoskeletal disorders, knee or hip replacement or spinal surgery in past year
- Able to provide own transportation to study visits
- Not involved in any other research study involving strength training or undergoing physical therapy
- Not dependent on a cane or walker
- Willing to provide informed consent
Exclusion Criteria:
- Weight loss or gain (±5%) in past 6 months
- Body mass >136 kg (DXA limit)
- Current smoker (No nicotine within past year) or evidence of alcohol or drug abuse
- Insulin dependent or uncontrolled diabetes (FBG >140 mg/dL)
- Uncontrolled hypertension (BP>180/100 mmHg)
- Abnormal kidney function or liver blood tests
- Serious conduction disorder (e.g., 3rd degree heart block), uncontrolled arrhythmia, or new Q waves or ST-segment depressions (>2 mm) on ECG
- Past or current cardiovascular disease, including uncontrolled angina or dysrhythmia, hypertrophic cardiomyopathy, congestive heart failure, PAD, stroke, history of myocardial infarction, use of defibrillator or major heart surgery, or deep vein thrombosis or pulmonary embolus. These will be reviewed on a case by case basis.
- Past or current respiratory disease (requiring steroid treatment or supplemental oxygen)
- Past or current clinical diagnoses of neurological or hematological disease
- Use of any medications that could influence study variables (growth/steroid hormones, prescription anti-inflammatory medications, or beta blockers, Coumadin or any other blood thinner, including Plavix, Ticid, and Aggrenox)
- Cancer requiring treatment in past 2 years, except non-melanoma skin cancers
- Clinically evident edema or anemia
Studieplan
Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
Kohorter og interventioner
Gruppe / kohorte |
|---|
|
Lean
Comparison data from this lean cohort will be compared to the obese older adults are already being collected in an R01-funded study (Improving Muscle for Functional Independence Trial; IRB00009098; NCT01049698)
|
Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Muscle Fiber
Tidsramme: Baseline
|
Primary Aim: To measure single muscle fiber contractile properties, including specific force, unloaded shortening velocity, and maximum power. We will also measure whole muscle strength and size and fiber fat infiltration. These results will establish a reference database against which data recorded in older obese individuals can be compared. Primary hypothesis: Single muscle fibers will exhibit more force and power in healthy non-obese than obese older adults due to greater intra-myocellular fat infiltration. |
Baseline
|
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Muscle Strength
Tidsramme: Baseline
|
Non-obese older adults will exhibit greater whole muscle strength (absolute and relative to muscle mass and volume) and power than obese, older adults.
|
Baseline
|
Samarbejdspartnere og efterforskere
Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.
Sponsor
Datoer for undersøgelser
Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.
Studer store datoer
Studiestart
1. juni 2012
Primær færdiggørelse (Faktiske)
1. september 2013
Studieafslutning (Faktiske)
1. november 2013
Datoer for studieregistrering
Først indsendt
7. juni 2012
Først indsendt, der opfyldte QC-kriterier
8. juni 2012
Først opslået (Skøn)
11. juni 2012
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
14. marts 2017
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
10. marts 2017
Sidst verificeret
1. marts 2017
Mere information
Begreber relateret til denne undersøgelse
Andre undersøgelses-id-numre
- IRB00019632
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
JA
IPD-planbeskrivelse
All data will be made available upon email request to the study PI and upon completion of a data-sharing agreement.
This agreement will require that data be used only for research purposes, that no attempts be made to identify individual patients, that the data will be kept secure, that the user will not distribute the data to other researchers, that the user will return the files or destroy them once the project is completed, and that the user will acknowledge the data source.
All data files will be de-identified.
In addition, variables that could permit linkages to individual research participants and variables that could lead to deductive disclosure of the identity of individual subjects will be removed or recoded.
We will create a link on our website that describes our study and the data available for data sharing with descriptions.
Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .