title: Physical activity levels early after lung transplantation.
abstract: BACKGROUND
  Little is known of the early changes in physical activity after lung transplantation.
  
  
  OBJECTIVE
  The purposes of this study were: (1) to describe physical activity levels in patients up to 6 months following lung transplantation and (2) to explore predictors of the change in physical activity in that population.
  
  
  METHODS
  This was a prospective cohort study.
  
  
  METHODS
  Physical activity (daily steps and time spent in moderate-intensity activity) was measured using an accelerometer before and after transplantation (at hospital discharge, 3 months, and 6 months). Additional functional measurements included submaximal exercise capacity (measured with the 6-Minute Walk Test), quadriceps muscle torque, and health-related quality of life (measured with the Medical Outcomes Study 36-Item Short-Form Health Survey 36 [SF-36] and the St George's Respiratory Questionnaire).
  
  
  RESULTS
  Thirty-six lung transplant recipients (18 men, 18 women; mean age=49 years, SD=14) completed posttransplant measurements. Before transplant, daily steps were less than a third of the general population. By 3 months posttransplant, the largest improvement in physical activity had occurred, and level of daily steps reached 55% of the general population. The change in daily steps (pretransplant to 3 months posttransplant) was inversely correlated with pretransplant 6-minute walk distance (r=-.48, P=.007), daily steps (r=-.36, P=.05), and SF-36 physical functioning (SF-36 PF) score (r=-.59, P=.0005). The SF-36 PF was a significant predictor of the change in physical activity, accounting for 35% of the variation in change in daily steps.
  
  
  CONCLUSIONS
  Only individuals who were ambulatory prior to transplant and discharged from the hospital in less than 3 months were included in the study.
  
  
  CONCLUSIONS
  Physical activity levels improve following lung transplantation, particularly in individuals with low self-reported physical functioning. However, the majority of lung transplant recipients remain sedentary between 3 to 6 months following transplant. The role of exercise training, education, and counseling in further improving physical activity levels in lung transplant recipients should be further explored.
authors.affiliation: L. Wickerson, BScPT, MSc, PhD(c), Toronto Lung Transplant Program, University Health Network, 200 Elizabeth St, 4EC-305, Toronto, Ontario, Canada M5G 2C4, and Department of Physical Therapy, University of Toronto, Toronto, Ontario, Canada. lisa.wickerson@utoronto.ca.
authors.forename: Lisa
authors.initials: L
authors.lastname: Wickerson
authors.affiliation: S. Mathur, BScPT, MSc, PhD, Department of Physical Therapy, University of Toronto.
authors.forename: Sunita
authors.initials: S
authors.lastname: Mathur
authors.affiliation: L.G. Singer, MD, Toronto Lung Transplant Program, University Health Network, and Department of Medicine, University of Toronto.
authors.forename: Lianne G
authors.initials: LG
authors.lastname: Singer
authors.affiliation: D. Brooks, BScPT, MSc, PhD, Department of Physical Therapy, University of Toronto.
authors.forename: Dina
authors.initials: D
authors.lastname: Brooks
mesh_terms: D000328:Adult; D017079:Exercise Tolerance; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D016040:Lung Transplantation / Q000534:rehabilitation; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D011184:Postoperative Period; D011446:Prospective Studies; D011788:Quality of Life