RT conserves LBM in dieting women

Discussion in 'Hypertrophy Research' started by dkm1987, Mar 29, 2008.

  1. dkm1987

    dkm1987 New Member

    Obesity (Silver Spring). 2008 Mar 6 [Epub ahead of print] Links
    Resistance Training Conserves Fat-free Mass and Resting Energy Expenditure Following Weight Loss.Hunter GR, Byrne NM, Sirikul B, Fernández JR, Zuckerman PA, Darnell BE, Gower BA.
    [1] 1Department of Human Studies, University of Alabama at Birmingham, Birmingham, Alabama, USA [2] 2Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, Alabama, USA.

    Objective:To determine what effect diet-induced approximately 12 kg weight loss in combination with exercise training has on body composition and resting energy expenditure (REE) in premenopausal African-American (AA) and European-American (EA) women.Methods and Procedures:This study was a longitudinal, randomized weight loss clinical intervention, with either aerobic (AT), resistance (RT), or no exercise training (NT). Forty-eight AA and forty-six EA premenopausal overweight (BMI between 27 and 30) women underwent weight loss to a BMI <25. Body composition (densitometry), REE (indirect calorimetry), maximal oxygen uptake (VO(2)max), and muscular strength (isometric elbow flexion) were evaluated when subjects were in energy balance.Results:AA women lost less fat-free mass (FFM, P </= 0.05) (47.0 +/- 4.6 to 46.9 +/- 5.0 kg) than EA women (46.4 +/- 4.9 to 45.2 +/- 4.6 kg). Regardless of race, RT maintained FFM (P </= 0.05) following weight loss (46.9 +/- 5.2 to 47.2 +/- 5.0 kg) whereas AT (45.4 +/- 4.2 to 44.4 +/- 4.1 kg) and NT (47.9 +/- 4.7 to 46.4 +/- 5.1 kg) decreased FFM (P </= 0.05). Both AT and NT decreased in REE with weight loss but RT did not. Significant time by group interactions (all P </= 0.05) for strength indicated that RT maintained strength and AT did not.Discussion:AA women lost less FFM than EA women during equivalent weight losses. However, following weight loss in both AA and EA, RT conserved FFM, REE, and strength fitness when compared to women who AT or did not train.Obesity (2008) doi:10.1038/oby.2008.38.
     
  2. colby2152

    colby2152 New Member

    Isn't it common knowledge that LBM retention is increased with weight lifting? I mean, if you do not lift weights, your muscles will melt away!!
     
  3. Bryan Haycock

    Bryan Haycock Administrator Staff Member

    bumping this over to hypertrophy...I'd like to get people who are into sports start to do a little digging for research on running faster, jumping higher, and getting stronger.

    -bryan
     

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