Measurement of daily activity in restrictive type anorexia nervosa.
OBJECTIVE
The assessment of daily activity in patients with restrictive type anorexia nervosa is limited by an absence of accurate and precise technology. We wanted to test a daily activity detecting device named, the physical activity monitoring system (PAMS).


METHODS
Women participants with restrictive type anorexia nervosa (n = 8, 36 +/- 11 years, 17 +/- 2 kg/m(2)) and healthy women participants (n = 8, 30 +/- 11 years, 27 +/- 7 kg/m(2)) were asked to lie, sit, and stand motionless, and walk at 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 mph while wearing PAMS.


RESULTS
For all restrictive type anorexia nervosa and healthy participants, body posture was correctly detected for all measurements (300/300). There was excellent correlation of an individual's body acceleration with walking velocity and walking energy expenditure (r(2) > .99).


CONCLUSIONS
The PAMS technology could serve as a tool for lending insight into the pathophysiology of restrictive type anorexia nervosa; and potentially measuring compliance with activity recommendations for medical professionals treating individuals with restrictive type anorexia nervosa.
Harris
Ann M
AM
Endocrine Research Unit, Mayo Clinic, Rochester, Minnesota 55905, USA.
McAlpine
Donald E
DE
Shirbhate
Rashmi
R
Manohar
Chinmay U
CU
Levine
James A
JA
D000203:Activities of Daily Living; D000328:Adult; D000856:Anorexia Nervosa / Q000175:diagnosis* / Q000453:epidemiology / Q000523:psychology*; D015992:Body Mass Index; D004594:Electrophysiology / Q000295:instrumentation; D004734:Energy Metabolism; D004867:Equipment Design; D005260:Female; D006801:Humans; D009043:Motor Activity; D009748:Nutrition Disorders / Q000453:epidemiology; D009752:Nutritional Status; D011187:Posture; D012720:Severity of Illness Index; D016138:Walking