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Effects of Physical Activity on Insulin Resistance and Adiposity in Polycystic Ovary Syndrome "Poly"

18 Years
30 Years
Not Enrolling
Polycystic Ovary Syndrome, Obesity

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Trial Information

Effects of Physical Activity on Insulin Resistance and Adiposity in Polycystic Ovary Syndrome "Poly"

Young, overweight/obese women with PCOS along with age and BMI-matched healthy controls
without PCOS will be enrolled in this study. Participants will have assessments of body
composition (by DEXA), visceral and ectopic fat (by MR), ovarian parameters (follicle size
and number, by MRI) insulin sensitivity (by euglycemic hyperinsulinemic clamp), interstitial
lipolysis (by microdialysis), whole body lipolysis and glycolysis (by stable isotopes),
aerobic fitness (by VO2max test) and a fat biopsy performed across two clinic visits (1
outpatient visit, and 1 overnight stay). Participants in the control group will undergo
these assessments once only, whereas participants in the PCOS Group will have these
assessments twice, once at baseline and once following a 16 week supervised aerobic exercise
program. Throughout the exercise program body weight will be measured weekly and menstrual
cycle frequency will be documented on a calendar. Additionally, vital signs, weight, waist
and hip circumferences will be measured and a fasting blood sample collected every 4 weeks.

Inclusion Criteria:

- Women between the ages of 18-30, inclusive.

- BMI greater than or equal to 25.

- Sedentary lifestyle - not currently exercising more than 60 minutes per week.

- A medical diagnosis of polycystic ovary syndrome. The diagnosis will be compared with
the most recent international criteria1. Together with irregular menses (fewer than 6
cycles per year), participants must also have at least one of the following

1. presence of polycystic ovaries on transvaginal ultrasound, >10 cysts, 2-8 mm in
diameter (ultrasound will not be done in this study however; ultrasound reports
will be used if available) and/or

2. clinical manifestations (hirsutism) examined by the PI at the screening visit or
biochemical evidence (elevated testosterone or free androgen index) of
hyperandrogenism, determined by fasting blood sample collected during the
screening visit.

- Women enrolling for the non-PCOS control group are required to have regular menstrual
cycles (one cycle per month).

Exclusion Criteria:

- Individuals with a history of cardiovascular disease or an elevated blood pressure
above 160/90 mmHg.

- Individuals with a history of Diabetes (Type 1 or Type 2).

- Individuals with a history of Kidney, Liver or Heart disease.

- Individuals with untreated thyroid disease.

- Individuals who smoke.

- Individuals who exercise more than 60 minutes per week.

- Individuals who use medications including contraceptives (medications used to treat
thyroid disease are permitted).

- Individuals with alcoholism or other substance abuse.

- Individuals who are pregnant or lactating (breast feeding).

- Individuals who become pregnant throughout the study will be excluded.

- Individuals who are trying to become pregnant.

- Control subjects will be excluded if they have irregular menses (fewer than 1 cycle
per month).

- Unable to complete approximately 60 minutes of medium intensity exercise per day (5
days per week) at the Pennington Health and Fitness Center (PCOS Group Only).

Type of Study:


Study Design:

Allocation: Non-Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Prevention

Outcome Measure:

Change in Insulin sensitivity as measured by the euglycemic hyperinsulinemic clamp

Outcome Description:

16-weeks of aerobic exercise training on: peripheral insulin sensitivity (euglycemic-hyperinsulinemic clamp) and catecholamines (microdialysis) during a euglycemic-hyperinsulinemic clamp.

Outcome Time Frame:

Baseline and 16-weeks

Safety Issue:


Principal Investigator

Leanne Readman, PhD

Investigator Role:

Principal Investigator

Investigator Affiliation:

Pennington Biomedical Research Center


United States: Institutional Review Board

Study ID:




Start Date:

January 2007

Completion Date:

June 2007

Related Keywords:

  • Polycystic Ovary Syndrome
  • Obesity
  • Obesity
  • Polycystic Ovary Syndrome



Pennington Biomedical Research CenterBaton Rouge, Louisiana  70808