WHAT (Women, Hot-flashes, Activity, Trial) - Physical Activity for Treatment of Hot Flushes Among Postmenopausal Women

• Change in mean hot-flashes frequency and intensity (per 24/hours). [ Time Frame: Baseline, 4 weeks, 8 weeks, 12 weeks, 16 weeks , 6 months and 1 year ] [ Designated as safety issue: No ]
  Potential participants receive a diary by mail and are asked to record frequency and severity of hot flashes and duration of sleep at night for a period of 14 subsequent days. During the study period the participants record frequency and intensity of hot flashes and duration of sleep at night for a period of 7 subsequent days at 4, 8, 12, 16 weeks and 6 months and one year.
  
  

• Quality of life measured with Women's Health Questionnaire (WHQ) 23 items. [ Time Frame: Baseline, 16 weeks, 6 months, one year. ] [ Designated as safety issue: Yes ]
  We will mesasure quality of life with Women's Health Quesstionnaire. This is a self-administered qustionnarie. A Norwegian version has been validated psycometric and linguistically.
  
  
• Depressive symptoms are measured with Beck Depression Inventory -II (BDI-II) [ Time Frame: Baseline, 16 weeks, 6 months ] [ Designated as safety issue: No ]
  The Beck Depression Inventory - Second Edition (BDI-II; Beck et al., 1996) is a 21-item self-report inventory designed to assess the presence and severity of depressive symptoms and is rated on a four-point Likert-type scale ranging from 0 to 3, reflecting the severity of each item. The BDI-II scores are classified as following: 0-13 minimal; 14-19 mild; 20-28 moderate; and 29-63 severe (Beck et al., 1996). A full description of the inventoriy including psychometric properties can be found in Steer, Ball, Ranieri, and Beck (1999).
  
  
• Dysfunctional attitudes related to cognitive vulnerability to depression. [ Time Frame: Baseline, 16 weeks, 6 months ] [ Designated as safety issue: No ]
  The Dysfunctional Attitude Scale (DAS)(Form A) (DAS; Weisman & Beck, 1978) is a 40-item self-report inventory to be rated along a seven-point Likert scale ranging from "totally agree" to "totally disagree", designed to assess the presence of dysfunctional attitudes that may relate to cognitive vulnerability to depression (Oliver & Baumgart, 1985). A full description including psychometric properties is provided by Chioqueta and Stiles (2004), Dobson and Breiter (1983) and Oliver and Baumgart (1985).
  
  
• Increased physical fitness, measured as 10 % increase in VO2-max [ Time Frame: Baseline, 16 weeks ] [ Designated as safety issue: No ]
  Physical fitness will be tested at the Regional Centre for Sport and Health, University of Tromsø, at baseline and after 16 weeks. VO2-max is used as a proxy for physical fitness.
  
  
• Motivation for change in physical activity - Stages of Change [ Time Frame: Baseline, 16 uker, 6 months and one year ] [ Designated as safety issue: No ]
  Permanent changes of behavior is difficult. We will use intstruments from the Transtheoretical Model of Change, the Stages of Change short and long form to evaluate motivation for increased physical acitivity among the participants in the WHAT pilot study. The instrument might give valuable information about who a prone drop-out during study period.
  
  
• Physical activity, motivation and experiences [ Time Frame: Betwen 2nd and 16th week ] [ Designated as safety issue: Yes ]
  During the study period approximately 20 women (both from the intervention group and the control group) will be asked to participate i a qualitative study of physical activity, motivation and experiences.
  
  

The WHAT study is a pragmatic randomized controlled trial with two parallel arms. The intervention is a 16 weeks individually tailored training programme with one hour physical activity 2-3 times per week. Women randomized to the control group are asked to keep physical activity at the same level as before the study.

Healthy postmenopausal women from Tromso will be recruited to the study by newspaper advertisements and media coverage. Interested women are asked to make a call. A staff member will ask about menopausal status, level of physical activity and diseases. Potential participants will receive a diary by mail and will be asked to record frequency and severity of hot-flashes, and duration of sleep at night for a period of 14 days. Women who return this diary will be asked to sign the informed consent and complete a questionnaire, before the fitness test. Baseline fitness is an important measure in this study. We will measure VO2-max (maximal oxygen consumption) as a proxy for fitness. Whether you are randomized to intervention or control group can influence the fitness test. The participants will therefore be randomized after the fitness test.

Randomization: Unit of Applied Clinical Research, Institute of Cancer Research and Molecular Medicine, Norwegian University of Science and Technology, Trondheim, Norway, will develop and administrate a web-based randomization system for the WHAT pilot study. The data base will be located at a server at the Medical Faculty at Norwegian University of Science and Technology in Trondheim. The following staff are authorized to randomize people in WHAT pilot study: Sameline Grimsgaard, Merethe Kumle, Sissel Andersen , Jorid Degerstrøm, Svein Arne Pettersen

In this pilot 50 women will be randomized either to intervention group (25 women) or control group (25 women).

Elements in the intervention: A physiotherapist will based on interview and physical examination make a plan for the 16 weeks physical activity programme for each participant. The program will start with Pilates classes and low intensity aerobic training (2-4 weeks). After this period, classes with moderate to high intensity aerobic training will be introduced. The aim of the intervention is to increase aerobic capacity with 10 % from baseline.

Both the intervention group and the control group will receive questionnaires at baseline, 4 weeks, 8 weeks, 12 weeks, 16 weeks, 6 months and 1 year after inclusion. We will run the test for physical fitness at baseline and 16 weeks.