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Acute Exercise on Brain Insulin Sensitivity

Rutgers The State University of New Jersey logo

Rutgers The State University of New Jersey

Status and phase

Enrolling
Phase 3
Phase 2

Conditions

Aging
Insulin Resistance
Cardiovascular Disease Risk
Obesity
Cognition

Treatments

Behavioral: Exercise

Study type

Interventional

Funder types

Other

Identifiers

NCT05853913
Pro2022001842

Details and patient eligibility

About

Dementia is a leading cause of death in the United States among aging adults. Brain insulin resistance has emerged as a pathologic factor affecting memory, executive function as well as systemic glucose control. Regular aerobic exercise decreases Alzheimer's Disease (AD) risk, in part, through changes in brain structure and function. However, there is limited data available on how exercise impacts brain insulin resistance in aging. This study will test the effect of acute exercise on brain insulin sensitivity in middle-aged to older adults. The study will also examine cognition and cardiometabolic health in relation to brain insulin sensitivity.

Full description

Obesity, hypertension, high blood glucose (e.g. prediabetes/type 2 diabetes), and physical inactivity is thought to worsen brain insulin resistance and reduce cerebral blood flow. This suggests lifestyle approaches may be necessary to counteract declines in brain health. Regular aerobic exercise decreases Alzheimer's Disease (AD) risk, in part, through changes in brain structure and function. Moreover, exercise-related structural changes in the brain, namely increased hippocampal volume, is linked to improved memory. However, there is limited data available on how exercise impacts brain insulin resistance in aging. It is also unclear if one bout of exercise may help improve brain insulin responses to insulin before fitness gains or weight loss in people at risk for dementia, type 2 diabetes and cardiovascular disease. Because single bouts of exercise are established to improve metabolic and vascular insulin sensitivity in people with obesity, the investigators anticipate exercise to raise brain insulin sensitivity in relation to cognition and cardiometabolic health.

Enrollment

40 estimated patients

Sex

All

Ages

40 to 80 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

  • Male or female >40 and <80 years old.
  • Has a body mass index >25 and <45 kg/m2.
  • Physical Activity (<150 min of moderate/high intensity exercise per week)

Exclusion criteria

  • Subjects who have not been weight stable (>2 kg weight change in past 3 months)
  • Subjects who are smokers or who have quit smoking <1 years ago
  • Subjects with abnormal estimated glomerular filtration rate (eGFR).
  • Hypertriglyceridemic (>400 mg/dl) and hypercholesterolemic (>260 mg/dl) subjects
  • Hypertensive (>160/100 mmHg)
  • Subjects with a history of significant metabolic, cardiac, congestive heart failure, cerebrovascular, hematological, pulmonary, gastrointestinal, liver, renal, or endocrine disease or cancer that in the investigator's opinion would interfere with or alter the outcome measures or impact subject safety.
  • Pregnant (as evidenced by positive urine pregnancy test) or nursing women
  • Subjects with contraindications to participation in an exercise
  • Current Pregnancy
  • Currently taking active weight suppression medication (e.g. phentermine, orlistat, lorcaserin, naltrexone-bupropion in combination, liraglutide, benzphetamine, diethylpropion, phendimetrazine)
  • Subjects currently taking medications that affect heart rate and rhythm (i.e. Ca++ channel blockers, nitrates, alpha- or beta-blockers).
  • Known contraindications for MRI imaging

Trial design

Primary purpose

Treatment

Allocation

Randomized

Interventional model

Crossover Assignment

Masking

None (Open label)

40 participants in 2 patient groups

Rest
No Intervention group
Description:
Individuals will rest for about 1 hour in the seated position to mimic time exercising.
Exercise
Experimental group
Description:
Individuals will exercise for at medium to hard intensity for 1 hour.
Treatment:
Behavioral: Exercise

Trial contacts and locations

4

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Central trial contact

Steven K Malin, PhD

Data sourced from clinicaltrials.gov

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