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Abstract: FR-PO541

Physical Activity and Sedentary Behaviour in Hemodialysis: Preliminary Data from a Pilot Study

Session Information

Category: Health Maintenance, Nutrition, and Metabolism

  • 1302 Health Maintenance, Nutrition, and Metabolism: Clinical

Authors

  • More, Keigan, Dalhousie University, Halifax, Nova Scotia, Canada
  • Cranston, Alec, Nova Scotia Health Authority, Halifax, Nova Scotia, Canada
  • Blanchard, Chris M., Dalhousie University , Halifax, Nova Scotia, Canada
  • Theou, Olga, Dalhousie University , Halifax, Nova Scotia, Canada
  • Vinson, Amanda Jean, Dalhousie University/NS Health Authority, Halifax, Nova Scotia, Canada
  • Dipchand, Christine, Dalhousie University/NS Health Authority, Halifax, Nova Scotia, Canada
  • Tennankore, Karthik K., Dalhousie University/NS Health Authority, Halifax, Nova Scotia, Canada
Background

Dialysis patients have reduced moderate to vigorous physical activity (MVPA), defined as activities that use ≥3 metabolic equivalents (METS). This has been shown in both self-reported surveys and objective accelerometer studies. Less attention has been directed towards sedentary behavior (SB), which is characterized by low energy expenditure (≤ 1.5 METS). Furthermore, locations where MVPA or SB occur are largely unknown for dialysis patients. Objective: To determine the number of minutes per day of MVPA and SB for in-center hemodialysis patients using accelerometers and to identify locations where MVPA and SB occur using global positioning software (GPS).

Methods

We analyzed a cross-section of adult in-center hemodialysis patients at tertiary care dialysis program, recruited over a three-month period. Patients were fit with the Actigraph GT3X accelerometer and Qstarz BT-Q1000X GPS receiver and were instructed to wear these devices for ≥10 hours/day for ≥4 days/week. Minutes of physical activity at various intensities and SB were described as was time spent at each activity level across different locations.

Results

Overall, 50 patients consented to participate in the study; 47 were fit with both devices, and 37 met the minimum accelerometer wear time of ≥4 days/week. Mean age of the cohort was 61±15 years. Diabetes (46%), coronary artery disease (34%), and heart failure (21%) were highly prevalent. Among those who fulfilled valid days, median wear time was 755 minutes/day (IQR 720-794), median sedentary time was 544 minutes/day (IQR 487-583), and median MVPA time was 2 minutes/day (IQR 1-9). The cohort spent 73% (IQR 64-78) of their wear time in a sedentary state, and only 0.3% (IQR 0.1-1.2) in MVPA. Only three patients met Canadian guidelines for weekly MVPA (≥150 minutes/week in bouts of ≥ 10 minutes). The majority of SB occurred in the home, hospital, and during transport, whereas most MVPA occurred at home.

Conclusion

Hemodialysis patients exhibit substantial SB and minimal MVPA across a multitude of locations. The home environment may represent an ideal location for behavior interventions as the majority of SB and MVPA occurs at home. Further studies are needed to determine the effects of these behaviors on clinical outcomes as well as to determine barriers to MVPA and facilitators of SB.