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@ARTICLE{Schmidt:120630,
      author       = {M. Schmidt$^*$ and J. Wiskemann$^*$ and C. M. Ulrich and A.
                      Schneeweiss$^*$ and K. Steindorf$^*$},
      title        = {{S}elf-reported physical activity behavior of breast cancer
                      survivors during and after adjuvant therapy: 12 months
                      follow-up of two randomized exercise intervention trials.},
      journal      = {Acta oncologica},
      volume       = {56},
      number       = {4},
      issn         = {0284-186X},
      address      = {Abingdon},
      publisher    = {Taylor $\&$ Francis Group},
      reportid     = {DKFZ-2017-01058},
      pages        = {618 - 627},
      year         = {2017},
      abstract     = {Exercise during and after breast cancer treatment has shown
                      several health benefits. However, little is known about the
                      courses, patterns, and determinants of physical activity of
                      breast cancer patients, and the role of exercise
                      interventions on their physical activity behavior in the
                      long run.Self-reported physical activity was assessed in 227
                      breast cancer survivors before, during, and three, six, and
                      12 months post-intervention within two randomized resistance
                      exercise trials performed during adjuvant chemo- or
                      radiotherapy, respectively, with similar designs. Multiple
                      ordinal logistic regression analyses were performed to
                      identify determinants of physical activity at these time
                      points.While the intervention group exercised a median
                      1.8 h/week during adjuvant therapy (interquartile range
                      1.4-2.5), $68\%$ of controls did not engage in any exercise.
                      At 12-months follow-up $32\%$ of patients did not engage in
                      any exercise irrespective of the intervention. Of the
                      patients who cycled for transportation pre-diagnosis about
                      half stopped cycling in the long term in both groups. In
                      contrast, walking was maintained over time. Major
                      determinants of low levels of exercise at 12-months
                      follow-up were low pre-diagnosis levels of exercise, lower
                      education, being postmenopausal, and having breast problems
                      or depressive symptoms. Further, the intervention appeared
                      to influence the type of sports performed, with strength
                      exercise being the most common type of exercise at follow-up
                      in the exercise group, more frequently compared to the
                      control group.The exercise intervention effectively
                      countervailed the decrease in physical activity during
                      cancer therapy and boosted strength exercise in the months
                      following the intervention, but in the longer term many
                      survivors were insufficiently active. Breast cancer
                      survivors may need continued motivation and practical
                      support tailored to their individual characteristics and
                      physical activity history to incorporate exercise in
                      everyday routine in the long term.},
      cin          = {G210 / V964},
      ddc          = {610},
      cid          = {I:(DE-He78)G210-20160331 / I:(DE-He78)V964-20160331},
      pnm          = {317 - Translational cancer research (POF3-317)},
      pid          = {G:(DE-HGF)POF3-317},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:28084890},
      doi          = {10.1080/0284186X.2016.1275776},
      url          = {https://inrepo02.dkfz.de/record/120630},
}