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Resting metabolic rate and postprandial thermogenesis by level of aerobic fitness in young women.
Eur J Clin Nutr. 1993 Aug; 47(8):575-85.EJ

Abstract

Resting metabolic rate (RMR) and the thermic effect of a meal (TEM) were compared among women of three levels of aerobic fitness. Twenty-three euthyroid, eumenorrheic women (aged 18-35 years) were divided into three groups based on VO2 max standardized for fat-free weight (FFW), as determined from a graded exercise test: High Fit (HF): n = 7, VO2 max > 70 ml*kg FFW-1*min-1; Moderately Fit (MF): n = 8, VO2 max = 55-70 ml*kg FFW-1*min-1; and Low Fit (LF): n = 8, VO2 max < 55 ml*kg FFW-1*min-1). At 0700h RMR was measured for 1 h by indirect calorimetry with subjects in a fasted, preovulatory state, having refrained from exercise on the preceding day. The subject then consumed a liquid meal (12 kcal*kg FFW-1) and indirect calorimetry was continued for 3 h to determine the TEM. RMR adjusted for FFW using analysis of covariance was significantly higher (P < 0.05) in the HF group (mean +/- SEM = 1.08 +/- 0.03 kcal*min-1) compared to the MF (0.99 +/- 0.04) and LF (0.90 +/- 0.04) groups. Group differences in the thermic response did not reach statistical significance, although there was a trend for a high TEM in the HF group. There was a positive relationship between RMR and energy flux (average daily kcalorie intake + daily kcaloric expenditure in physical activity). These results suggest that women who exhibit high levels of exercise and aerobic fitness may be less energy efficient during the non-exercise portion of the day then their less active counterparts.

Authors+Show Affiliations

Department of Food Science and Human Nutrition, Colorado State University, Ft. Collins 80523.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

8404794

Citation

Burke, C M., et al. "Resting Metabolic Rate and Postprandial Thermogenesis By Level of Aerobic Fitness in Young Women." European Journal of Clinical Nutrition, vol. 47, no. 8, 1993, pp. 575-85.
Burke CM, Bullough RC, Melby CL. Resting metabolic rate and postprandial thermogenesis by level of aerobic fitness in young women. Eur J Clin Nutr. 1993;47(8):575-85.
Burke, C. M., Bullough, R. C., & Melby, C. L. (1993). Resting metabolic rate and postprandial thermogenesis by level of aerobic fitness in young women. European Journal of Clinical Nutrition, 47(8), 575-85.
Burke CM, Bullough RC, Melby CL. Resting Metabolic Rate and Postprandial Thermogenesis By Level of Aerobic Fitness in Young Women. Eur J Clin Nutr. 1993;47(8):575-85. PubMed PMID: 8404794.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Resting metabolic rate and postprandial thermogenesis by level of aerobic fitness in young women. AU - Burke,C M, AU - Bullough,R C, AU - Melby,C L, PY - 1993/8/1/pubmed PY - 1993/8/1/medline PY - 1993/8/1/entrez SP - 575 EP - 85 JF - European journal of clinical nutrition JO - Eur J Clin Nutr VL - 47 IS - 8 N2 - Resting metabolic rate (RMR) and the thermic effect of a meal (TEM) were compared among women of three levels of aerobic fitness. Twenty-three euthyroid, eumenorrheic women (aged 18-35 years) were divided into three groups based on VO2 max standardized for fat-free weight (FFW), as determined from a graded exercise test: High Fit (HF): n = 7, VO2 max > 70 ml*kg FFW-1*min-1; Moderately Fit (MF): n = 8, VO2 max = 55-70 ml*kg FFW-1*min-1; and Low Fit (LF): n = 8, VO2 max < 55 ml*kg FFW-1*min-1). At 0700h RMR was measured for 1 h by indirect calorimetry with subjects in a fasted, preovulatory state, having refrained from exercise on the preceding day. The subject then consumed a liquid meal (12 kcal*kg FFW-1) and indirect calorimetry was continued for 3 h to determine the TEM. RMR adjusted for FFW using analysis of covariance was significantly higher (P < 0.05) in the HF group (mean +/- SEM = 1.08 +/- 0.03 kcal*min-1) compared to the MF (0.99 +/- 0.04) and LF (0.90 +/- 0.04) groups. Group differences in the thermic response did not reach statistical significance, although there was a trend for a high TEM in the HF group. There was a positive relationship between RMR and energy flux (average daily kcalorie intake + daily kcaloric expenditure in physical activity). These results suggest that women who exhibit high levels of exercise and aerobic fitness may be less energy efficient during the non-exercise portion of the day then their less active counterparts. SN - 0954-3007 UR - https://www.unboundmedicine.com/medline/citation/8404794/Resting_metabolic_rate_and_postprandial_thermogenesis_by_level_of_aerobic_fitness_in_young_women_ L2 - https://medlineplus.gov/exerciseandphysicalfitness.html DB - PRIME DP - Unbound Medicine ER -