[show abstract][hide abstract] ABSTRACT: Physical activity has been shown to benefit cancer survivors' physical functioning, emotional well-being, and symptoms. Physical activity may be of particular benefit to survivors of endometrial cancer because they are more likely to be obese and sedentary than the general population, as these are risk factors for the disease, and thus experience a number of related co-morbid health problems. However, there is little research systematically studying mechanisms of physical activity adherence in cancer survivor populations. This paper describes the design of the Steps to Health study, which applies a Social Cognitive Theory-based model of endometrial cancer survivors' adoption and maintenance of exercise in the context of an intervention to increase walking or other moderate intensity cardiovascular activity. In Steps to Health we will test the influence of self-efficacy and outcome expectations on adherence to exercise recommendations, as well as studying the determinants of self-efficacy. Endometrial cancer survivors who are at least 6 months post-treatment are provided with an intervention involving print materials and telephone counseling, and complete assessments of fitness, activity, self-efficacy and outcome expectations, and determinants of self-efficacy every two months for a six month period. In addition to testing an innovative model, the Steps to Health study employs multiple assessment methods, including ecological momentary assessment, implicit tests of cognitive variables, and ambulatory monitoring of physical activity. The study results can be used to develop more effective interventions for increasing physical activity in sedentary cancer survivors by taking into account the full complement of sources of self-efficacy information and outcome expectations.
Psychology of Sport and Exercise 01/2011; 12(1):27-35. · 1.72 Impact Factor
[show abstract][hide abstract] ABSTRACT: Self-efficacy can be affected by mastery experiences and somatic sensations. A novel exercise experience and associated sensations may impact self-efficacy and subsequent behaviors. We investigated the effect of a single exercise session on self-efficacy for sedentary endometrial cancer survivors compared with sedentary women of a similar age, but with no cancer history.
Twenty survivors and 19 controls completed an exercise session performed as a submaximal cycle ergometry test. Sensations and efficacy were measured before and after exercise. Repeated measures analysis of variance (ANOVA) was performed. Regression models were used to determine predictors of self-efficacy and subsequent exercise.
Self-efficacy increased for both survivors and controls, but survivors had a higher rate of increase, and the change predicted subsequent exercise. The association between exercise-related somatic sensations and self-efficacy differed between the 2 groups.
A novel exercise experience had a larger effect on self-efficacy and subsequent exercise activity for endometrial cancer survivors than controls. Somatic sensations experienced during exercise may differ for survivors, which may be related to the experience of having cancer. Understanding factors affecting confidence in novel exercise experiences for populations with specific cancer histories is of the utmost importance in the adoption of exercise behaviors.
Journal of physical activity & health 11/2010; 7(6):784-93. · 1.95 Impact Factor
[show abstract][hide abstract] ABSTRACT: This study aims to determine the prevalence of physical activity and obesity and their relationship to physical functioning (PF), fatigue, and pain in endometrial cancer survivors.
Surveys were mailed to 200 survivors of endometrial cancer diagnosed within the last 5 years; 61% were returned. Surveys assessed physical activity, height and weight, comorbid health problems, PF, fatigue, and pain.
In all, 22% exercised in the past month at the level of current public health recommendations, 41% reported no physical activity, and 38% reported some activity. A total of 16% were overweight and 50% were obese. Both lower body mass index (BMI) and higher physical activity were related to better PF. Higher physical activity was related to less fatigue, primarily for patients of normal BMI.
Results suggest endometrial cancer survivors' obesity and inactivity contributes to poorer quality of life. This population could benefit from quality-of-life interventions incorporating physical activity.
American journal of obstetrics and gynecology 01/2009; 200(3):288.e1-8. · 3.28 Impact Factor
[show abstract][hide abstract] ABSTRACT: Many breast cancer survivors experience long term sequelae, including fatigue, decreased physical functioning, pain, and psychological distress. Physical activity can ameliorate these problems, but there is little research on how activity should be performed to be most beneficial. This study explores how dimensions of physical activity (total energy expenditure, frequency, and duration) are associated with symptoms among breast cancer survivors.
We conducted a secondary analysis of data on physical activity behavior and symptoms in a cross-sectional study (n = 148) of breast cancer survivors who were off treatment and had been diagnosed within the past 5 years.
Multivariate analyses showed that total energy expenditure was associated with better general health (p = 0.006) and fewer depressive symptoms (p = 0.014), while frequency of activity was linearly related to physical functioning (p = 0.047), pain (0.057), general health (p < 0.001), and depressive symptoms (p < 0.001). Duration was related to physical functioning, pain, and general health, but the worst outcomes were reported by the participants with the shortest and longest duration of activity (quadratic trend p values = 0.002, 0.003, 0.008, respectively).
Greater total energy expenditure, higher physical activity frequency, and moderate duration were associated with better outcomes for most symptoms, although there was no relationship between any of the dimensions of physical activity and fatigue.
The association of better outcomes with higher energy expenditure, higher frequency of activity, and moderate duration indicates that increasing activity through multiple short bouts may be the most beneficial for breast cancer survivors. However, randomized studies are needed to confirm this finding.
Journal of Cancer Survivorship 11/2008; 2(4):253-61. · 3.57 Impact Factor