Mechanisms of Fatigability With Diabetes

Description

Pre-diabetes (Pre-D) is a precursor to type 2 diabetes (T2D) and characterized by increased exercise fatigability of lower limb muscles, that can impede exercise performance. The cause for the increased fatigability in people with Pre-D is not known. Given the profound vascular disease present in people who have had uncontrolled diabetes for several years, we will determine whether dynamic, fatiguing contractions of the lower limb muscles in people with Pre-D are limited by vascular dysfunction at multiple levels along the vascular tree including the artery, arteriole, and/or capillary. This clinical trial involves a novel exercise training regime involving blood flow restriction to the exercising limb will be used as a probe to further understand the vascular mechanisms for increased fatigability in people with Pre-D and T2D. The long-term goal is to better understand what limits exercise and functional performance in people with diabetes to help develop targeted, more effective exercise programs.

Conditions

Pre-diabetes, Type 2 Diabetes

Study Overview

Study Details

Study overview

Pre-diabetes (Pre-D) is a precursor to type 2 diabetes (T2D) and characterized by increased exercise fatigability of lower limb muscles, that can impede exercise performance. The cause for the increased fatigability in people with Pre-D is not known. Given the profound vascular disease present in people who have had uncontrolled diabetes for several years, we will determine whether dynamic, fatiguing contractions of the lower limb muscles in people with Pre-D are limited by vascular dysfunction at multiple levels along the vascular tree including the artery, arteriole, and/or capillary. This clinical trial involves a novel exercise training regime involving blood flow restriction to the exercising limb will be used as a probe to further understand the vascular mechanisms for increased fatigability in people with Pre-D and T2D. The long-term goal is to better understand what limits exercise and functional performance in people with diabetes to help develop targeted, more effective exercise programs.

Mechanisms of Fatigability and the Protective Effects of Exercise in People With Diabetes

Mechanisms of Fatigability With Diabetes

Condition
Pre-diabetes
Intervention / Treatment

-

Contacts and Locations

Milwaukee

Marquette University, Milwaukee, Wisconsin, United States, 53201

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.

For general information about clinical research, read Learn About Studies.

Eligibility Criteria

  • * Men and women adults 30 years to 85 years or less
  • * Pre-diabetes \[glycosylated hemoglobin (HbA1c) of 5.7-6.4% and fasting plasma glucose 100-125 mg/dL at the time of initial screening\]
  • * Controls \[normoglycemic with a HbA1c level ≤5.6% and fasting blood glucose ≤ 99 mg/dL (5.5 mmol/L)\]
  • * Type 2 Diabetes Mellitus \[elevated glycosylated hemoglobin (HbA1c) \>6.5% and \<10%\]
  • * Signs or symptoms of neuropathy
  • * Medications associated with advanced stages of T2D including insulin
  • * Poor glycemic control (HbA1c\>10%)
  • * Peripheral edema
  • * Severe obesity (BMI, \>45kg·m-2)
  • * Untreated hypothyroidism
  • * Smoking
  • * Hypertension
  • * Cardiovascular or musculoskeletal disease that preclude exercise testing
  • * Hormone replacement drugs or vasoactive medications

Ages Eligible for Study

30 Years to 85 Years

Sexes Eligible for Study

ALL

Accepts Healthy Volunteers

No

Collaborators and Investigators

Marquette University,

Study Record Dates

2027-04-01