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Table 2 Comparisons of mean (± SE) baseline and postprandial metabolic rate (kcal/min) expressed per kg of fat free mass (ffm) among groups

From: Changes in energy expenditure associated with ingestion of high protein, high fat versus high protein, low fat meals among underweight, normal weight, and overweight females

Metabolic Rate*
  Overweight Normal Weight Underweight
Time (min) kcal/min/ffm   kcal/min/ffm   kcal/min/ffm  
  HPHF HPLF HPHF HPLF HPHF HPLF
Baseline 0.022 ± 0.001 0.021 ± 0.001 0.021± 0.001 0.022 ± 0.001 0.021 ± 0.001 0.020 ± 0.001
30 0.026 ± 0.001 0.024 ± 0.001 0.025 ± 0.001 0.026 ± 0.001 0.023 ± 0.001 0.023 ± 0.001
60 0.027 ± 0.001 0.026 ± 0.001 0.026 ± 0.001 0.026 ± 0.001 0.023 ± 0.001 0.023 ± 0.001
90 0.027 ± 0.001 0.026 ± 0.001 0.025 ± 0.001 0.026 ± 0.001 0.022 ± 0.001 0.023 ± 0.001
120 0.027 ± 0.001 0.025 ± 0.001 0.025 ± 0.001 0.025 ± 0.001 0.023 ± 0.001 0.021 ± 0.001
150 0.026 ± 0.001 0.024 ± 0.001 0.024 ± 0.001 0.024 ± 0.001 0.023 ± 0.001 0.022 ± 0.001
180 0.025 ± 0.001 0.024 ± 0.001 0.024 ± 0.001 0.023 ± 0.001 0.022 ± 0.001 0.023 ± 0.001
210 0.026 ± 0.001 0.023 ± 0.001 0.025 ± 0.001 0.023 ± 0.001 0.023 ± 0.001 0.022 ± 0.001
  1. * No difference among groups at baseline, but a significant (p = 0.0001) effect of BMI classification across all postprandial times and treatments. However, the difference in energy expenditure between the overweight and normal weight groups was not significant, but the energy expenditure of underweight group was still significantly less than the other two groups across all times and treatments.