title: Is preoperative physical activity related to post-surgery recovery?-a cohort study of colorectal cancer patients.
abstract: BACKGROUND
  An increasing interest is seen in the role of preoperative physical activity (PA) in enhancing postoperative recovery. The short-term effect of preoperative PA on recovery after colorectal cancer is unknown. The aim of this study was to evaluate the association of the preoperative level of PA with postoperative recovery after surgery due to colorectal cancer disease.
  
  
  METHODS
  This is a prospective observational cohort study, with 115 patients scheduled to undergo elective colorectal surgery. The self-reported level of preoperative PA was compared to measures of recovery.
  
  
  RESULTS
  Regular self-reported preoperative PA was associated with a higher chance of feeling highly physically recovered 3 weeks after surgery (relative chance 3.3, p = 0.038), compared to physical inactivity. No statistically significant associations were seen with length of hospital stay, self-assessed mental recovery, re-admittances or with re-operations.
  
  
  CONCLUSIONS
  In clinical practice, evaluating the patients' level of PA is feasible and may potentially be used as a prognostic tool for patients undergoing colorectal cancer surgery. Given the study design, the results from this study cannot prove causality.
  
  
  CONCLUSIONS
  The present study found that the preoperative level of PA was associated with a faster self-assessed physical recovery after colorectal cancer surgery. PA did not show any associations with the primary outcome measure length of hospital stay or any of the other secondary outcome measures. Assessment of PA level preoperatively could be used for prognostic reasons. If systematic preoperative/postoperative physical training will enhance recovery, this remains to be studied in a randomized controlled study.
  
  
  CONCLUSIONS
  We examined preoperative physical activity and the recovery after colorectal cancer surgery. Physically active individuals had faster self-assessed physical recovery. Assessment of preoperative physical activity may provide prognostic clinical information.
authors.affiliation: Department of Surgery, SSORG-Scandinavian Surgical Outcomes Research Group, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sahlgrenska University Hospital/Östra, Sahlgrenska University Hospital, SSORG, 416 85, Gothenburg, Sweden. aron.onerup@gu.se.
authors.forename: Aron
authors.identifier: http://orcid.org/0000-0002-1946-3529
authors.initials: A
authors.lastname: Onerup
authors.affiliation: Department of Surgery, SSORG-Scandinavian Surgical Outcomes Research Group, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sahlgrenska University Hospital/Östra, Sahlgrenska University Hospital, SSORG, 416 85, Gothenburg, Sweden.
authors.forename: David
authors.initials: D
authors.lastname: Bock
authors.affiliation: Institute of Neuroscience and Physiology, Institute of Food, Nutrition and Sport Science, Sahlgrenska Academy, Göteborg University, and Sahlgrenska University Hospital/Östra, Gothenburg, Sweden.
authors.forename: Mats
authors.initials: M
authors.lastname: Börjesson
authors.affiliation: Department of Physical Therapy and Department of Surgery, Sahlgrenska Academy at Gothenburg University, Gothenburg, Sweden.
authors.forename: Monika
authors.initials: M
authors.lastname: Fagevik Olsén
authors.affiliation: Department of Surgery, SSORG-Scandinavian Surgical Outcomes Research Group, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sahlgrenska University Hospital/Östra, Sahlgrenska University Hospital, SSORG, 416 85, Gothenburg, Sweden.|School of Business, Economics and IT, University West, Trollhättan, Sweden.
authors.forename: Martin
authors.initials: M
authors.lastname: Gellerstedt
authors.affiliation: Department of Surgery, SSORG-Scandinavian Surgical Outcomes Research Group, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sahlgrenska University Hospital/Östra, Sahlgrenska University Hospital, SSORG, 416 85, Gothenburg, Sweden.
authors.forename: Eva
authors.initials: E
authors.lastname: Haglind
authors.affiliation: Department of Surgery, SSORG-Scandinavian Surgical Outcomes Research Group, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sahlgrenska University Hospital/Östra, Sahlgrenska University Hospital, SSORG, 416 85, Gothenburg, Sweden.
authors.forename: Hanna
authors.initials: H
authors.lastname: Nilsson
authors.affiliation: Department of Surgery, SSORG-Scandinavian Surgical Outcomes Research Group, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Sahlgrenska University Hospital/Östra, Sahlgrenska University Hospital, SSORG, 416 85, Gothenburg, Sweden.
authors.forename: Eva
authors.initials: E
authors.lastname: Angenete
mesh_terms: D000368:Aged; D015331:Cohort Studies; D015179:Colorectal Neoplasms / Q000503:physiopathology* / Q000601:surgery*; D003710:Demography; D015444:Exercise; D005260:Female; D006801:Humans; D007902:Length of Stay; D008297:Male; D010359:Patient Readmission; D011184:Postoperative Period; D011300:Preoperative Care; D011788:Quality of Life; D020127:Recovery of Function; D012086:Reoperation; D018582:Sick Leave; D016896:Treatment Outcome
keywords: Colorectal cancer; Physical activity; Preoperative; Recovery; Surgery