Reproducibility of 24-h energy expenditure, substrate utilization and spontaneous physical activity in obesity measured in a respiration chamber
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Reproducibility of 24-h energy expenditure, substrate utilization and spontaneous physical activity in obesity measured in a respiration chamber. / Toubro, S.; Christensen, N. J.; Astrup, Arne.
In: International Journal of Obesity, Vol. 19, No. 8, 1995, p. 544-549.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Reproducibility of 24-h energy expenditure, substrate utilization and spontaneous physical activity in obesity measured in a respiration chamber
AU - Toubro, S.
AU - Christensen, N. J.
AU - Astrup, Arne
PY - 1995
Y1 - 1995
N2 - OBJECTIVE: Determination of within-subject day-to-day coefficients of variations (CV) of 24-h measurements of spontaneous physical activity (SPA), macronutrient oxidation, energy expenditure (EE) and heart rate (HR). DESIGN: Two 24-h measurements in respiration chamber, separated by 14 days of strict weight stability. SUBJECTS: 22 healthy obese subjects, 15 females and seven males (age 27 - 64 y, BMI: 30 - 39 kg/m2). MEASUREMENTS: SPA assessed by microwave radar, substrate oxidation and EE measured by indirect calorimetry and heart rate measured by telemetry. RESULTS: For 24-h measurements CV was 0.8% for RQ, 6.7% for fat oxidation, 5.6% for carbohydrate oxidation, 14.5% for protein oxidation, and 4.3% for heart rate. SPA assessed by microwave radar was also reproducible (CV = 9.7%). Within-subject day-to-day coefficients of variations (CV) were 1.5 and 1.8% for 24-h EE and sleeping EE, and 4.1% for RMR. Both on day 1 and 14, 93.4% of the variation in 24-h EE could be explained by differences in fat-free mass (92.3 and 92.4%, respectively) and SPA (1.1 and 1.0%, respectively). Also the algorithm and correlation between 24-h RQ and 24-h energy balance were highly reproducible (r = 0.56, P < 0.01 and r = 0.48, P < 0.05). CONCLUSION: Both macronutrient oxidation, SPA and EE in obese patients can be determined with high reprodicubility in a respiration center.
AB - OBJECTIVE: Determination of within-subject day-to-day coefficients of variations (CV) of 24-h measurements of spontaneous physical activity (SPA), macronutrient oxidation, energy expenditure (EE) and heart rate (HR). DESIGN: Two 24-h measurements in respiration chamber, separated by 14 days of strict weight stability. SUBJECTS: 22 healthy obese subjects, 15 females and seven males (age 27 - 64 y, BMI: 30 - 39 kg/m2). MEASUREMENTS: SPA assessed by microwave radar, substrate oxidation and EE measured by indirect calorimetry and heart rate measured by telemetry. RESULTS: For 24-h measurements CV was 0.8% for RQ, 6.7% for fat oxidation, 5.6% for carbohydrate oxidation, 14.5% for protein oxidation, and 4.3% for heart rate. SPA assessed by microwave radar was also reproducible (CV = 9.7%). Within-subject day-to-day coefficients of variations (CV) were 1.5 and 1.8% for 24-h EE and sleeping EE, and 4.1% for RMR. Both on day 1 and 14, 93.4% of the variation in 24-h EE could be explained by differences in fat-free mass (92.3 and 92.4%, respectively) and SPA (1.1 and 1.0%, respectively). Also the algorithm and correlation between 24-h RQ and 24-h energy balance were highly reproducible (r = 0.56, P < 0.01 and r = 0.48, P < 0.05). CONCLUSION: Both macronutrient oxidation, SPA and EE in obese patients can be determined with high reprodicubility in a respiration center.
KW - Carbohydrate
KW - Energy balance
KW - Energy expenditure
KW - Fat and protein oxidation
KW - Indirect calorimetry
KW - Obesity
KW - Reproducibility
UR - http://www.scopus.com/inward/record.url?scp=0029028907&partnerID=8YFLogxK
M3 - Journal article
C2 - 7489024
AN - SCOPUS:0029028907
VL - 19
SP - 544
EP - 549
JO - International Journal of Obesity
JF - International Journal of Obesity
SN - 0307-0565
IS - 8
ER -
ID: 209796855