Articles producció científica> Bioquímica i Biotecnologia

The respiratory quotient as a prognostic factor in weight-loss rebound.

  • Identification data

    Identifier: PC:1615
    Authors:
    J Salas SalvadoS ValtueñaPG Lorda
    Abstract:
    OBJECTIVE: To investigate the possible metabolic factors predisposing to weight gain subsequent to the cessation of a rapid-weight-loss diet. DESIGN: Prospective, longitudinal, intervention study of a 2MJ diet daily for 28 d in a metabolic ward followed by a 12- month outpatient follow-up under a conventional, hypocaloric diet. SUBJECTS: Thirty-five females and one male, all with morbid obesity defined by a body mass index_35 kg/m2. MEASUREMENTS: VO2 and VCO2 measured by 30 min indirect calorimetry to calculate resting energy expenditure and resting respiratory quotient at the beginning and end of very-low-calorie diet; body composition assessed by hydrostatic weighing on day 1; weight recorded on days 1 and 28 and at follow-up of 3, 6 and 12 months. RESULTS: From among all the variables considered, the resting respiratory quotient measured on day 28, even adjusted for weight loss during hospitalisation, was the only one that correlated significantly with the weight changes recorded during follow-up. CONCLUSION: Subjects who showed a respiratory quotient on day 28 in the lower range (<0.72) were more able to maintain the weight-loss achieved with the very-low-calorie diet while those in the higher range (>0.75) were less able to do so over the follow-up period. Thus, an appropriately measured respiratory quotient could prove useful in clinical practice as a prognostic marker of the long-term effectiveness of low- and very-low-calorie diets used to induce rapid weight loss.
  • Others:

    Author, as appears in the article.: J Salas Salvado; S Valtueña ; PG Lorda
    Department: Bioquímica i Biotecnologia
    URV's Author/s: SALAS SALVADÓ, JORGE; S Valtueña ; PG Lorda
    Keywords: resting energy expenditure respiratory quotient obesity
    Abstract: OBJECTIVE: To investigate the possible metabolic factors predisposing to weight gain subsequent to the cessation of a rapid-weight-loss diet. DESIGN: Prospective, longitudinal, intervention study of a 2MJ diet daily for 28 d in a metabolic ward followed by a 12- month outpatient follow-up under a conventional, hypocaloric diet. SUBJECTS: Thirty-five females and one male, all with morbid obesity defined by a body mass index_35 kg/m2. MEASUREMENTS: VO2 and VCO2 measured by 30 min indirect calorimetry to calculate resting energy expenditure and resting respiratory quotient at the beginning and end of very-low-calorie diet; body composition assessed by hydrostatic weighing on day 1; weight recorded on days 1 and 28 and at follow-up of 3, 6 and 12 months. RESULTS: From among all the variables considered, the resting respiratory quotient measured on day 28, even adjusted for weight loss during hospitalisation, was the only one that correlated significantly with the weight changes recorded during follow-up. CONCLUSION: Subjects who showed a respiratory quotient on day 28 in the lower range (<0.72) were more able to maintain the weight-loss achieved with the very-low-calorie diet while those in the higher range (>0.75) were less able to do so over the follow-up period. Thus, an appropriately measured respiratory quotient could prove useful in clinical practice as a prognostic marker of the long-term effectiveness of low- and very-low-calorie diets used to induce rapid weight loss.
    Research group: Alimentació, Nutrició, Creixement i Salut Mental
    Thematic Areas: Bioquímica i biotecnologia Bioquímica y tecnología Biochemistry and technology
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 0307-0565
    Author identifier: orcid.org/0000-0003-2700-7459; N/D; N/D
    Record's date: 2016-06-08
    Last page: 817
    Journal volume: 21
    Papper version: info:eu-repo/semantics/publishedVersion
    Link to the original source: https://www.nature.com/articles/0800480?utm_medium=affiliate&utm_source=commission_junction&utm_campaign=3_nsn6445_deeplink_PID2190813&utm_content=deeplink
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.1038/sj.ijo.0800480
    Entity: Universitat Rovira i Virgili
    Journal publication year: 1997
    First page: 811
    Publication Type: Article Artículo Article
  • Keywords:

    Obesitat
    Despesa Energètica Basal
    resting energy expenditure
    respiratory quotient
    obesity
    Bioquímica i biotecnologia
    Bioquímica y tecnología
    Biochemistry and technology
    0307-0565
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