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Women in Steady Exercise Research [Formerly Women, Oxidative Stress, Exercise and Estrogens (WOSEE)] (WISER)

This study has been completed.
Information provided by:
University of Minnesota - Clinical and Translational Science Institute Identifier:
First received: October 25, 2006
Last updated: November 8, 2010
Last verified: November 2010

RATIONALE: Exercising regularly may lower the risk of breast cancer.

PURPOSE: This randomized clinical trial is studying how well exercise prevents breast cancer in healthy young women.

Condition Intervention Phase
Breast Cancer
Behavioral: exercise
Phase 2
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Prevention
Official Title: Women in Steady Exercise Research (WISER)

Resource links provided by NLM:

Further study details as provided by University of Minnesota - Clinical and Translational Science Institute:

Primary Outcome Measures:
  • Changes in urine levels of F2-isoprostanes [ Time Frame: Before and after study ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Changes in levels of IGF-axis proteins [ Time Frame: Before and after study ] [ Designated as safety issue: No ]
  • Changes in insulin and glucose [ Time Frame: Before and after study ] [ Designated as safety issue: No ]
  • Changes in estrogen metabolites [ Time Frame: Before and after study ] [ Designated as safety issue: No ]
  • Changes in body composition [ Time Frame: Before and after study ] [ Designated as safety issue: No ]

Enrollment: 400
Study Start Date: May 2006
Study Completion Date: March 2010
Primary Completion Date: September 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: exercise
5 days per week exercise for 4 months
Behavioral: exercise
5 days per week exercise for 4 months
No Intervention: no exercise

Detailed Description:



  • Compare the changes in urine levels of a stable marker of oxidative stress (F_2-isoprostanes) in healthy young women who undergo exercise training during 4 menstrual cycles vs no exercise.


  • Assess the changes in other metabolic factors that explain the association between physical activity and breast cancer, including:

Estrogen metabolism (estrone, estradiol, estriol, 2-OHE_1, 2-OHE_2, 2-MeOHE_1, 2-MeOHE_2, 4-OHE_1, 4-OHE_2 [as well as ratios of these metabolites], insulin-like growth factor (IGF)-1 (as well as IGF-binding proteins-1, -2, and -3, insulin, glucose, body composition (including body mass index, lean mass, and body fat [DEXA scan]).

OUTLINE: This is a randomized, controlled study. Participants are stratified according to baseline body fat percentage and age (18 to 24 years vs 25 to 30 years). Participants are randomized to 1 of 2 intervention arms.

  • Arm I: Participants exercise for 30 minutes 5 times a week. The intensity of exercise is increased every 4 weeks. The exercise regimen continues for up to 4 menstrual cycles.
  • Arm II: Participants are observed for 4 menstrual cycles. Participants in both arms undergo 24-hour collection of urine on days 7, 8, and 9 of menstrual cycles 1 and 6. F_2-isoprostanes are measured via gas chromatography-mass spectrometry (GC/MS). Estrogens are also measured by GC/MS and include E_1, E_2, E_3, 2-OHE_1, 2-OHE_2, 4-OHE_1, 4-OHE_2, 2-MeE_1, 2-MeE_2, 4-MeE_1, 4-MeE_2, and 16OHE_1.

Participants undergo blood collection, body mass measurement by dual-energy x-ray absorptiometry, and a fitness assessment twice during the 6-month study.

PROJECTED ACCRUAL: A total of 400 participants will be accrued.


Ages Eligible for Study:   18 Years to 30 Years
Genders Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Healthy women
  • Self-reported menstrual cycle length of 25-35 days within the past 2 months
  • Nonsmoker
  • Sedentary (exercise < 3 times weekly within the past 6 months)
  • Intact ovaries and uterus
  • No history of gynecological problems (e.g., fibroids, endometriosis, polycystic ovary syndrome)
  • Female
  • Premenopausal
  • Body mass index 18.5 to 40
  • Stable weight (no changes ≥ 10% within the past year)

Exclusion Criteria:

  • No pregnancy or breast feeding within the past 6 months
  • No plans to become pregnant during study treatment
  • No cancer within the past 5 years except for nonmelanoma skin cancers
  • No medical condition that would prohibit participation in a vigorous program of weight-bearing aerobic exercise including, but not limited to, any of the following:

    • Fibromyalgia
    • Chronic fatigue syndrome
    • Metabolic disorders
    • Recent cardiovascular event
    • Orthopedic limitations
    • Psychiatric disorders requiring antipsychotic drugs
  • No uncontrolled hypertension (systolic blood pressure [BP] > 160 mm Hg and/or diastolic BP > 99 mm Hg)
  • No more than 7 alcoholic beverages per week
  • No injected hormonal contraceptive use within the past year
  • More than 6 months since prior use of intrauterine device
  • More than 3 months since prior oral or patch hormone contraceptives
  • No medication that would prohibit participation in a vigorous program of weight-bearing aerobic exercise
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00393172

United States, Minnesota
University of Minnesota - St. Paul Campus
St. Paul, Minnesota, United States, 55108
Sponsors and Collaborators
University of Minnesota - Clinical and Translational Science Institute
Principal Investigator: Mindy Kurzer University of Minnesota - Clinical and Translational Science Institute
  More Information

Additional Information:
No publications provided by University of Minnesota - Clinical and Translational Science Institute

Additional publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Mindy Kurzer, University of Minnesota Identifier: NCT00393172     History of Changes
Obsolete Identifiers: NCT00354718
Other Study ID Numbers: CDR0000511819, U54CA116849, UMN-0505M69867
Study First Received: October 25, 2006
Last Updated: November 8, 2010
Health Authority: United States: Institutional Review Board

Keywords provided by University of Minnesota - Clinical and Translational Science Institute:
breast cancer
estrogen metabolism
oxidative stress

Additional relevant MeSH terms:
Breast Neoplasms
Body Weight
Breast Diseases
Neoplasms by Site
Nutrition Disorders
Signs and Symptoms
Skin Diseases processed this record on November 20, 2014