Article

OBJECTIVE: To evaluate the reliability and validity of a body monitoring device
against measures obtained from indirect calorimetry (IC) in patients with
fibromyalgia syndrome (FMS) during various incremental exercise intensities.
DESIGN: Cross-sectional reliability and validity study. SETTING: Testing was
completed in a university exercise physiology laboratory. PARTICIPANTS: Women
(N=25) with FMS, with a mean age +/- SD of 48.6+/-8.4 years and a median symptom
duration of 15 years (25th-75th percentiles, 10-23y), were recruited to the
study. INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Patients walked and
jogged on a treadmill at 4 intensities (50m.min(-1), 0% grade [n=25];
83.3m.min(-1), 0% grade [n=25]; 116.7m.min(-1), 0% grade [n=21]; 116.7m.min(-1),
2.5% grade [n=13]) during 2 measurement conditions, while IC and a
multiple-sensor body monitor measured energy expenditure (EE). The differences
between the readings (test 1 - test 2) and the SD of the differences, intraclass
correlation coefficient (ICC), 95% confidence interval (CI) for the ICC,
coefficient of repeatability, intrapatient SD, standard error of mean (SEM),
minimal detectable change, Wilcoxon signed-rank test, and Bland-Altman graphs
were used to examine reliability. The magnitude of the associations between IC
and the body monitoring device, ICC, 95% CI for the ICC, paired t tests, and
Bland-Altman graphs were used to examine the validity of the body monitoring
device versus the IC. RESULTS: Moderate to excellent test-retest reliability was
found for the 4 bouts of exercise (ICC=.73-.76). The SEM and minimal detectable
change were satisfactory for the 4 bouts of exercise (.54-1.18kcal.min(-1) and
1.51-3.28kcal.min(-1), respectively). The differences mean between test and
retest were lower than the SEM for the 4 bouts of exercise, varying from -.17 to
.14kcal.min(-1). No significant differences were found between test and retest
for any bout. The Bland-Altman plots and the coefficients of repeatability
indicated that the differences between repeated tests would lie within 2 SDs in
95% of the cases for the 4 bouts of exercise. Significant associations were found
between the body monitoring device and IC measurements of EE for the 4 bouts of
exercise (r=.87-.99). The differences for all bouts between the 2 methods were
nonsignificant, except for the second bout (P<.001). The ICCs and Bland-Altman
plots of EE for the 4 bouts showed high agreement (ICCs=.84-.99) and sufficient
accuracy for quantifying EE during exercise in patients with FMS. CONCLUSIONS:
The body monitoring device provided a valid and reliable estimate of EE in
patients with FMS during walking on horizontal and inclined surfaces in a
laboratory setting across various exercise intensities.
CI - Copyright (c) 2012 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS