Fat mass modifies the association of fat-free mass with symptom-limited treadmill duration in the Coronary Artery Risk Development in Young Adults (CARDIA) Study  

Oleh:

Zhu, Na ; Jacobs Jr, David R. ; Sidney, Stephen

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: The American Journal of Clinical Nutrition vol. 94 no. 02 (Aug. 2011), page 385-391.
Topik: Obesity; Eating Disorders
Fulltext: Am J Clin Nutr-2011-Zhu-385-91.pdf (192.04KB)

Ketersediaan

Perpustakaan FK Nomor Panggil: A07.K.2011.02 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Background: The assessment of fat mass and fat-free mass in relation to the symptom-limited maximal exercise duration (Maxdur) of a treadmill test allows for insight into the association of body composition with treadmill performance potential. Objective: We investigated the complex associations between fat mass and fat-free mass and Maxdur in a population setting. Design: The Maxdur of a graded exercise treadmill test and body composition by dual-energy X-ray absorptiometry were estimated in 2413 black and white men and women aged 38–50 y from the Coronary Artery Risk Development in Young Adults (CARDIA) cohort. Results: The mean Maxdur was ˜7.5 s shorter per kilogram of fat mass in both men and women and independent of fat-free mass, height, race, television watching, physical activity, systolic blood pressure, lung function, and education. Fat mass modified the association of fat-free mass with the Maxdur (2-way interaction P < 0.001), and the interaction was stronger in women than in men. In men in the lowest fat-mass quartile, the Maxdur was 1.3 s longer per kilogram of fat-free mass and was 0.5 s shorter per kilogram of fat-free mass in the highest fat-mass quartile. In contrast, in women with the least fat mass, the Maxdur was 2.7 s longer per kilogram of fat-free mass and was 2.8 s shorter per kilogram of fat-free mass in the highest fat-mass quartile. Conclusions: The Maxdur was negatively related to fat mass. Fat-free mass in obese people contributed little to the treadmill performance potential as assessed by the Maxdur, although the contribution of fat-free mass was positive in thinner people.

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