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Effects of habitual physical activity on the resting metabolic rates and body compositions of women aged 35 to 50 years.

Abstract

OBJECTIVE

To examine the effect habitual physical activity has on resting metabolic rate (RMR) and body composition (fat-free mass[FFM], fat mass, and percent body fat) in active compared to sedentary adult women.

DESIGN

RMR was measured (by indirect calorimetry) twice after a 12-hour fast at the same point of the menstrual cycle and 48 hours after exercise. FFM, fat mass and percent body fat were measured using whole body air displacement plethysmography. Energy intake and expenditure were determined using 7-day weighed-food records and activity logs.

SUBJECTS

Healthy, weight-stable premenopausal women aged 35 to 50 years classified as either active (approximately 9 hours per week of physical activity for 10 or more years) (n= 18) or sedentary (approximately 1 hour per week of physical activity) (n= 14).

STATISTICAL ANALYSES

Analysis of covariance was used to investigate differences in mean RMR (kcal/day) between the groups adjusted for FFM, and independent t tests were used to determine differences in demographic, energy expenditure, and diet variables.

RESULTS

Percent body fat and fat mass were lower (P<.0005) and RMR (adjusted for FFM) was significantly higher in the active women (P=.045) compared with sedentary controls. In the active and sedentary groups respectively, mean adjusted RMR was 1,510 kcal/day and 1,443 kcal/day, body fat was 18.9% and 28.8%, and fat mass was 11.1 kg and 18.8 kg. Groups were similar in body mass, FFM, body mass index, and age. Mean energy balance appeared to be more negative in the active group (P=.0059) due to significantly higher mean self-reported energy expenditures (P=.0001) and similar mean self-reported energy intakes (P=.52) compared with sedentary controls. These data indicate that active women who participate in habitual physical activity can maintain lower body fat and a higher RMR than sedentary controls with similar body mass, FFM, and body mass index.

APPLICATIONS/CONCLUSIONS

This research supports and emphasizes the benefits of habitual physical activity in maintaining RMR and lower body fat levels in middle-aged women.

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  • Publisher Full Text
  • Authors+Show Affiliations

    ,

    Department of Nutrition, Arizona State University East, Mesa, USA.

    , , ,

    Source

    MeSH

    Adipose Tissue
    Adult
    Analysis of Variance
    Basal Metabolism
    Body Composition
    Body Mass Index
    Body Weight
    Calorimetry, Indirect
    Diet Records
    Energy Intake
    Energy Metabolism
    Exercise
    Female
    Human Activities
    Humans
    Life Style
    Middle Aged

    Pub Type(s)

    Comparative Study
    Journal Article

    Language

    eng

    PubMed ID

    11678489

    Citation

    Gilliat-Wimberly, M, et al. "Effects of Habitual Physical Activity On the Resting Metabolic Rates and Body Compositions of Women Aged 35 to 50 Years." Journal of the American Dietetic Association, vol. 101, no. 10, 2001, pp. 1181-8.
    Gilliat-Wimberly M, Manore MM, Woolf K, et al. Effects of habitual physical activity on the resting metabolic rates and body compositions of women aged 35 to 50 years. J Am Diet Assoc. 2001;101(10):1181-8.
    Gilliat-Wimberly, M., Manore, M. M., Woolf, K., Swan, P. D., & Carroll, S. S. (2001). Effects of habitual physical activity on the resting metabolic rates and body compositions of women aged 35 to 50 years. Journal of the American Dietetic Association, 101(10), pp. 1181-8.
    Gilliat-Wimberly M, et al. Effects of Habitual Physical Activity On the Resting Metabolic Rates and Body Compositions of Women Aged 35 to 50 Years. J Am Diet Assoc. 2001;101(10):1181-8. PubMed PMID: 11678489.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Effects of habitual physical activity on the resting metabolic rates and body compositions of women aged 35 to 50 years. AU - Gilliat-Wimberly,M, AU - Manore,M M, AU - Woolf,K, AU - Swan,P D, AU - Carroll,S S, PY - 2001/10/27/pubmed PY - 2002/1/5/medline PY - 2001/10/27/entrez SP - 1181 EP - 8 JF - Journal of the American Dietetic Association JO - J Am Diet Assoc VL - 101 IS - 10 N2 - OBJECTIVE: To examine the effect habitual physical activity has on resting metabolic rate (RMR) and body composition (fat-free mass[FFM], fat mass, and percent body fat) in active compared to sedentary adult women. DESIGN: RMR was measured (by indirect calorimetry) twice after a 12-hour fast at the same point of the menstrual cycle and 48 hours after exercise. FFM, fat mass and percent body fat were measured using whole body air displacement plethysmography. Energy intake and expenditure were determined using 7-day weighed-food records and activity logs. SUBJECTS: Healthy, weight-stable premenopausal women aged 35 to 50 years classified as either active (approximately 9 hours per week of physical activity for 10 or more years) (n= 18) or sedentary (approximately 1 hour per week of physical activity) (n= 14). STATISTICAL ANALYSES: Analysis of covariance was used to investigate differences in mean RMR (kcal/day) between the groups adjusted for FFM, and independent t tests were used to determine differences in demographic, energy expenditure, and diet variables. RESULTS: Percent body fat and fat mass were lower (P<.0005) and RMR (adjusted for FFM) was significantly higher in the active women (P=.045) compared with sedentary controls. In the active and sedentary groups respectively, mean adjusted RMR was 1,510 kcal/day and 1,443 kcal/day, body fat was 18.9% and 28.8%, and fat mass was 11.1 kg and 18.8 kg. Groups were similar in body mass, FFM, body mass index, and age. Mean energy balance appeared to be more negative in the active group (P=.0059) due to significantly higher mean self-reported energy expenditures (P=.0001) and similar mean self-reported energy intakes (P=.52) compared with sedentary controls. These data indicate that active women who participate in habitual physical activity can maintain lower body fat and a higher RMR than sedentary controls with similar body mass, FFM, and body mass index. APPLICATIONS/CONCLUSIONS: This research supports and emphasizes the benefits of habitual physical activity in maintaining RMR and lower body fat levels in middle-aged women. SN - 0002-8223 UR - https://www.unboundmedicine.com/medline/citation/11678489/Effects_of_habitual_physical_activity_on_the_resting_metabolic_rates_and_body_compositions_of_women_aged_35_to_50_years_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0002-8223(01)00289-9 DB - PRIME DP - Unbound Medicine ER -