- ICH GCP
- US Clinical Trials Registry
- Klinisk utprøving NCT00765505
Muscle Lipid and Insulin Resistance in the Elderly (MIRA)
Studieoversikt
Status
Forhold
Intervensjon / Behandling
Detaljert beskrivelse
Hypothesis and Specific Aims:
To determine whether aerobic exercise improves both skeletal muscle fat distribution and insulin sensitivity of older men and women. We will test two hypotheses.
i. Physical exercise in older adults will decrease the amount of fat interspersed within muscle, specifically the fat between muscle groups (intermuscular adipose tissue) as well as decrease specific lipid metabolites within muscle cells, compared to controls.
ii. Exercise-induced improvements in insulin sensitivity of older men and women will be related to the changes in muscle fat content independent of changes in total body fat or visceral abdominal adipose tissue.
To determine whether increased capacity for oxidative fatty acid metabolism within muscle results in improved insulin sensitivity in older adults. We will test two hypotheses.
i. Exercise training will increase the capacity of muscle to oxidize fatty acids assessed both in vitro and in vivo.
ii. Improved capacity for oxidative fatty acid metabolism will predict improvements in insulin sensitivity.
Studietype
Registrering (Faktiske)
Fase
- Ikke aktuelt
Kontakter og plasseringer
Studiesteder
-
-
Pennsylvania
-
Pittsburgh, Pennsylvania, Forente stater, 15213
- University of Pittsburgh
-
-
Deltakelseskriterier
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
Tar imot friske frivillige
Kjønn som er kvalifisert for studier
Beskrivelse
Inclusion Criteria:
- 60 - 70 years of age
- No weight gain/loss of >10 lbs in 6 months
- Sedentary (No more than 1 continuous exercise/week) or Highly trained (>5 exercise sessions/week for a duration of one year or more)
- Non-Smoker
- BMI 18-38.0
- Resting blood pressure less than 150mmHg systolic/95 mmHg diastolic
- Normal glucose tolerance: Fasting glucose < 100 mg/dl or 2 hour glucose from OGTT < 140 mg/dl or impaired glucose tolerance (fasting glucose > 100 mg/dl < 126 mg/dl or 2 hour glucose from OGTT > 140 mg/dl but less than 200 mg/dl
- Note from PCP/Cardiologist for exercise clearance if positive stress test symptoms were observed from GXT
Exclusion Criteria:
- Clinically significant CVD including h/o MI
- Peripheral Vascular Disease
- Hepatic, renal, muscular/neuromuscular, or active hematologic/oncologic disease
- Clinically diminished pulse
- Presence of bruits in lower extremities
- Previous history of pulmonary emboli
- Peripheral Neuropathy
- Currently not engaged in a regular program and have a V)2 max pre-training value > 55 ml/kg-fat free mass-min., indicative of moderate fitness OR currently engaged in regular program and having a V)2 max value < 55 ml/kg-fat free mass-min.
- Anemia (Hematocrit < 34%)
- Any contraindications to moderate exercise
- Inability and/or willingness to comply with the protocol as written
- Active alcohol or substance abuse (Past 5 years)
- Total cholesterol > 300 mg/dL
- Triglyceride > 350 mg/dL
- ALT > 80, AST > 80, Alk Phos > 240
- Proteinuria (defined as > 1+ on routine dipstick) hypothyroidism (sTSH>8)
- Therapeutic Doses of Nicotinic Acid
- Type 2 Diabetes: Fasting Glucose > 126 mg/dl or 2 hour glucose > 200 mg/dl
- Oral Glucocorticoids
- Females currently on hormone replacement therapy (HRT) less than 6 months
- Claustrophobia
- Previous difficulty with lidocaine or other local anesthetic
Stress test symptoms:
- Positive ECG (>2mm ST segment depression) without PCP cardiologist permission to participate
- Signs or symptoms of cardiovascular decomposition (hypotensive response to exercise
- Onset of angina or angina like symptoms, shortness of breath, change in heart rhythm, signs of poor perfusion (light-headedness), tightness
- Hypotension
Studieplan
Hvordan er studiet utformet?
Designdetaljer
- Primært formål: Behandling
- Tildeling: Randomisert
- Intervensjonsmodell: Parallell tildeling
- Masking: Ingen (Open Label)
Våpen og intervensjoner
Deltakergruppe / Arm |
Intervensjon / Behandling |
---|---|
Eksperimentell: 1
Exercise Group
|
Sixteen week intervention where subjects will be progressed to four days per week for 45 minutes per session, 180 minutes minimum per week, of moderate intensity supervised exercise.
|
Eksperimentell: Health Education Group
|
Sixteen week intervention.
This group will not receive specific exercise education or prescription but will be asked to participate in biweekly health education sessions
|
Hva måler studien?
Primære resultatmål
Resultatmål |
Tidsramme |
---|---|
Insulin sensitivity and muscle fat content will be measured at the beginning and the end of the intervention to determine the effects of exercise on these measures.
Tidsramme: 16 weeks
|
16 weeks
|
Sekundære resultatmål
Resultatmål |
Tidsramme |
---|---|
Examine if exercise-induced improvements in insulin sensitivity are similar in normal weight and in obese older subjects.
Tidsramme: 16 weeks
|
16 weeks
|
Samarbeidspartnere og etterforskere
Sponsor
Samarbeidspartnere
Etterforskere
- Hovedetterforsker: Bret H. Goodpaster, PhD, University of Pittsburgh
Studierekorddatoer
Studer hoveddatoer
Studiestart
Primær fullføring (Faktiske)
Studiet fullført (Faktiske)
Datoer for studieregistrering
Først innsendt
Først innsendt som oppfylte QC-kriteriene
Først lagt ut (Anslag)
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
Siste oppdatering sendt inn som oppfylte QC-kriteriene
Sist bekreftet
Mer informasjon
Begreper knyttet til denne studien
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
- 0405764
- 5R01AG021961 (U.S. NIH-stipend/kontrakt)
Denne informasjonen ble hentet direkte fra nettstedet clinicaltrials.gov uten noen endringer. Hvis du har noen forespørsler om å endre, fjerne eller oppdatere studiedetaljene dine, vennligst kontakt register@clinicaltrials.gov. Så snart en endring er implementert på clinicaltrials.gov, vil denne også bli oppdatert automatisk på nettstedet vårt. .
Kliniske studier på Exercise Group
-
Shengjing HospitalRekruttering
-
Ayşegül İşler DalgıçHorizonHar ikke rekruttert ennåStress, følelsesmessig | Helserisikoatferd | Helserelatert atferd | Sunn livsstil | Mangel på fysisk aktivitet | Sunn ernæring | Indeks for sunt kosthold | Ikke-smittsomme sykdommerTyrkia
-
Al-Azhar UniversityFullførtKlasse II feilslutningEgypt
-
RenJi HospitalHar ikke rekruttert ennåVæskerespons | Slagvolumvariasjon | SVV-FloTrac | Thorax elektrisk bioimpedansKina
-
RenJi HospitalHar ikke rekruttert ennåVæskerespons | Slagvolumvariasjon | SVV-FloTrac | Thorax elektrisk bioimpedansKina
-
AdventHealthAdventist UniversityFullførtSvimmelhetForente stater
-
Boston Medical CenterNational Institute of Mental Health (NIMH)FullførtPosttraumatisk stresslidelseForente stater
-
Hui-Hsun ChiangFullførtUtdanningsproblemer | Sykepleie | Vold på arbeidsplassenTaiwan
-
IR Technology, LLCFullførtOvervekt | Kroppsvekt | Cellulitt | Fettbrenning | Magefett | FettvevsatrofiForente stater
-
Community Health Center of Franklin CountyMassachusetts General Hospital; Just RootsUkjent