Physical Behaviour and Event Based analysis, 2014 ISBPNA symposium, San Diego - Malcolm Granat
1. Physical Behaviour model and Event
Based analysis
Where events provide more
information than volume
Malcolm Granat
Professor of Health and Rehabilitation Sciences
School of Health Sciences
University of Salford
2. 1. Physical Behaviours model
2. Event based analysis
3. Analysis of walking behaviour
4. Sedentary behaviour and lying
5. Summary
Outline
3. LIGHT MODERATE
Physical Activity (PA)
INACTIVE VIGOROUS
Sedentary
Behaviour (SB)
{ Current Models
?
?
Malcolm Granat ISBNPA, San Diego, May 2014
4. LIGHT MODERATE
Physical Activity (PA)
INACTIVE VIGOROUS
Sedentary
Behaviour (SB)
{Physical Behaviours Model
Physical Behaviour (PB)
?
?
Malcolm Granat ISBNPA, San Diego, May 2014
5. “Measurement of sleep in research: not a waste of time”
Jean-Philippe Chaput
Physical Behaviours Model
Malcolm Granat ISBNPA, San Diego, May 2014
6. • Physical Behaviours (PB) encompasses all
Physical Activities and Sedentary Behaviour
• PB lead to Energy Expenditure
• Interventions aim to change PB
• Need to measure and quantify PB
Physical Behaviours Model
Malcolm Granat ISBNPA, San Diego, May 2014
7. 1. Physical Behaviours model
2. Event based analysis
3. Analysis of walking behaviour
4. Sedentary behaviour and lying
5. Summary and the future
Outline
Malcolm Granat ISBNPA, San Diego, May 2014
8. Epoch based
Granat. Event-based analysis of free-living behaviour. 2012, Physiological Measurement.
Conceptual approaches
Event based
Malcolm Granat ISBNPA, San Diego, May 2014
9. Epochs and Events
• Epoch
a user defined period (usually 1 minute or 15
seconds) with a single value representing the
acceleration in that time period.
• Event
a continuous physical activity belonging to a single
class with a defined start time and duration.
It may have another parameter(s) associated with it.
Malcolm Granat ISBNPA, San Diego, May 2014
10. Epochs and Events
• Epoch
a user defined period (usually 1 minute or 15
seconds) with a single value representing the
acceleration in that time period.
• Event
a continuous physical activity belonging to a single
class with a defined start time and duration.
It may have another parameter(s) associated with it.
Malcolm Granat ISBNPA, San Diego, May 2014
27. Quantification of Physical Behaviours
PatternsofEvents
BEHAVIOUR
Malcolm Granat ISBNPA, San Diego, May 2014
28. 1. Physical Behaviours model
2. Event based analysis
3. Analysis of walking behaviour
4. Sedentary behaviour and lying
5. Summary and the future
Outline
Malcolm Granat ISBNPA, San Diego, May 2014
29. Aim
To objectively quantify their mobility challenges
The condition: Intermittent Claudication
• Due to peripheral arterial disease
• Cramping pain in legs on walking
• Pain gets worse the longer walking
• Pain relieved on resting
Challenges in free-living activities:
• Interrupted/short walking bouts
• Slower walking (Lower cadence)
Clinical Challenges – Limited walking ability
Malcolm Granat ISBNPA, San Diego, May 2014
30. Group 1 (n=30)
Diagnosis of
intermittent claudication
Group 2 (n=30)
Matched controls
Intermittent claudicants Matched controls
Sex [# female (%)] 12 (40%) 12 (40%)
Age [years] 67.2 ± 9.7 66.8 ± 10.5
BMI [kg.m-2] 26.2 ± 4.0 26.0 ± 4.4.
Both groups wore an activPAL for seven consecutive days
Clare Clarke’s PhD data
Clinical Challenges – Limited walking ability
Malcolm Granat ISBNPA, San Diego, May 2014
31. Clinical Challenges – Limited walking ability
Malcolm Granat ISBNPA, San Diego, May 2014
37. Clinical Challenges – Limited walking ability
Population Steps/day Average
Cadence
Cadence
Variability
Controls 3,303 99 14.2
IC patients 1,983 96 10.8
Malcolm Granat
38. Clinical Challenges – Limited walking ability
Population Steps/day Average
Cadence
Cadence
Variability
Controls 2,915 102 12.9
IC patients 1,269 98 8.5
Malcolm Granat
39. Clinical Challenges – Limited walking ability
Population Steps/day Average
Cadence
Cadence
Variability
Controls 1,950 107 11.8
IC patients 1,442 101 7.8
Malcolm Granat
40. 1. Physical Behaviours model
2. Event based analysis
3. Analysis of walking behaviour
4. Sedentary behaviour and lying
5. Summary and the future
Outline
Malcolm Granat ISBNPA, San Diego, May 2014
41. Sedentary Behaviour and Lying
Sedentary
Activities
Physical
Behaviours
Sitting Lying
y-axis
Malcolm Granat ISBNPA, San Diego, May 2014
48. 1. Physical Behaviours model and Event based
analysis
2. Upright analysis
3. Sedentary behaviour and lying
4. Analysis of cadence
5. Summary and the future
Outline
Malcolm Granat ISBNPA, San Diego, May 2014
55. Thank YOU for listening
And thank you to:
• Clare Clarke, University of Dundee
• Philippa Dall, Glasgow Caledonian University
• Ben Stansfield, Glasgow Caledonian University
• David Loudon, PAL Technologies Ltd
Contact details
email: m.h.granat@salford.ac.uk
ICAMPAM 2015
Limerick, Ireland 10th – 12th June 2015
www.icampam2015.org
The latest research on the measurement of
Physical Behaviour
