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The effect of prior exercise on the ...

Votruba, Susanne Maria Loretta Breuer.

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The effect of prior exercise on the utilization of dietary fat.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	The effect of prior exercise on the utilization of dietary fat./
作者:	Votruba, Susanne Maria Loretta Breuer.
面頁冊數:	154 p.
附註:	Source: Dissertation Abstracts International, Volume: 63-08, Section: B, page: 3662.
Contained By:	Dissertation Abstracts International63-08B.
標題:	Health Sciences, Nutrition. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3060602
ISBN:	0493763147

The effect of prior exercise on the utilization of dietary fat.
Votruba, Susanne Maria Loretta Breuer.

The effect of prior exercise on the utilization of dietary fat. - 154 p.

Source: Dissertation Abstracts International, Volume: 63-08, Section: B, page: 3662.

Thesis (Ph.D.)--The University of Wisconsin - Madison, 2002.

One solution to the current obesity epidemic is to prevent weight gain in individuals. Recent studies show that higher levels of physical activity are associated with lower body weight and weight maintenance. The benefit of exercise may be due to altered partitioning of dietary fat between oxidation and storage. We used [1-<super>13</super>C] oleate and [d31] palmitate to measure dietary fatty acid oxidation after rest and exercise (1250 kJ) at light (25% VO2peak), moderate (65% VO2peak), and heavy (85% VO2peak) intensities. Young, normal weight, female subjects were recruited to participate. When the tracers are administered with a meal 30 min postexercise, there is an increase in the 11.5 h cumulative oxidation of [1-<super>13</super>C] oleate (33.0 ± 3.2%, 45.1 ± 3.4%, 54.2 ± 3.6°10, and 50.6 ± 3.8%; for rest, light, moderate, and heavy, respectively; P = 0.0008). [D31] palmitate oxidation did not increase with prior exercise (12 ± 2%, 14 ± 1%, 17 ± 2%, and 14 ± 2% for rest, light, moderate, and heavy; P = 0.30). We also examined the effect of dose time on the oxidation of the fatty acids. Tracers were administered at 30 minutes (breakfast dose; B), 3.5h (lunch dose; L), or 8.5h (dinner dose; D) post-exercise or rest. Following exercise, there was greater oxidation of [1-<super>13</super>C] oleate following the L (62.6 ± 2.7%) than B (53.4 ± 2.9%) or D (54.8 ± 2.6%) doses (P = 0,05). After rest, [1-<super>13</super>C] oleate did not differ between dose times (36.2 ± 2,8%, 42.1 ± 4.7%, and 41.8 ± 2.6% for B, L, D). As in the previous trial, [d31] palmitate oxidation did not increase following exercise. Palmitate oxidation, however, increased with later dose times (18.3 ± 2.2%, 22.3 ± 2.4%, and 26.8 ± 1.7% for B, L, and D; P < 0.005). These data indicate that prior exercise increases the oxidation of the monounsaturated fatty acids, oleate, but not the saturated palmitate. Additionally, we have shown that palmitate oxidation increases later in the day, regardless of prior exercise. This suggests that a potential mechanism for the protective effect of physical activity on weight gain is the ability of exercise to partition dietary fat toward oxidation rather than storage. Further work needs to be done to titrate the level of exercise needed to maintain the effect and to explain large difference in oxidation between oleate and palmitate.

ISBN: 0493763147Subjects--Topical Terms:

1017801
Health Sciences, Nutrition.

The effect of prior exercise on the utilization of dietary fat.
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