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Titolo:
Fatty acid oxidation in African-American and Caucasian women during physical activity
Autore:
Hickner, RC; Privette, J; McIver, K; Barakat, H;
Indirizzi:
E Carolina Univ, Human Performance Lab, Dept Exercise & Sports Sci, Greenville, NC 27858 USA E Carolina Univ Greenville NC USA 27858 rts Sci, Greenville, NC 27858 USA E Carolina Univ, Dept Biochem, Greenville, NC 27858 USA E Carolina Univ Greenville NC USA 27858 Biochem, Greenville, NC 27858 USA E Carolina Univ, Dept Physiol, Greenville, NC 27858 USA E Carolina Univ Greenville NC USA 27858 Physiol, Greenville, NC 27858 USA
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 6, volume: 90, anno: 2001,
pagine: 2319 - 2324
SICI:
8750-7587(200106)90:6<2319:FAOIAA>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
WEIGHT-RELATED ATTITUDES; SKELETAL-MUSCLE; ENERGY-EXPENDITURE; RACIAL-DIFFERENCES; OBESITY; BLACK; BEHAVIORS;
Keywords:
body composition; obesity; respiratory exchange ratio;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Hickner, RC E Carolina Univ, Human Performance Lab, Dept Exercise & SportsSci, 371 Ward Sports Med Bldg, Greenville, NC 27858 USA E Carolina Univ 371 Ward Sports Med Bldg Greenville NC USA 27858
Citazione:
R.C. Hickner et al., "Fatty acid oxidation in African-American and Caucasian women during physical activity", J APP PHYSL, 90(6), 2001, pp. 2319-2324

Abstract

The goal of this study was to determine whether differences in physical activity-related fat oxidation exist between lean and obese African-American (LAA and OAA) and lean and obese Caucasian (LC and OC) premenopausal women. Lean AA (28.4 +/- 2.8 yr, n = 7), LC (24.7 +/- 1.8 yr, n = 9), OAA (30.9 +/- 2.2 yr, n = 11), and OC (34.1 +/- 2.5 yr, n = 9) women underwent preliminary assessment of peak aerobic capacity ((V) over dot O-2 peak). On a subsequent testing day, participants exercised after an 8-h fast on a cycle ergometer at 15 W (similar to 40% (V) over dot O-2 peak) for 10 min and then for 10 min at similar to 65% (V) over dot O-2 peak. Fatty acid oxidation wasdetermined using the average respiratory exchange ratio and O-2 consumption during minutes 5-9 of the exercise session. Percent body fat and fat-freemass were lower (P < 0.05) in LAA (25.8 +/- 2.8% and 48.3 kg) and LC (26.4+/- 2.0% and 45.8 +/- 1.7 kg) than in OAA (41.2 +/- 1.3% and 58.8 +/- 3.3 kg) and OC (39.3 +/- 2.7% and 58.6 kg) women. Fat oxidation among the groups was analyzed statistically using analysis of covariance with fat-free mass and (V) over dot O-2 peak as covariates. During exercise at 15 W, fat oxidation was as low in LAA (0.134 +/- 0.024 g/min) as in OAA (0.144 +/- 0.026g/min) and OC (0.156 +/- 0.020 g/min) women: all these rates of fat oxidation were lower than in LC women (0.200 +/- 0.021 g/min, P < 0.05, LC vs. all other groups). Fatty acid oxidation during higher-intensity exercise (65%(V) over dot O-2 peak) was higher in LC than in OC women but was not statistically different between African-American and Caucasian groups. Fatty acid oxidation was therefore lower during low-intensity physical activity in OAA, LAA, and OC than in LC women.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/01/20 alle ore 03:21:49