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Gender differences in leucine, but not lysine, kinetics.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lamont, Linda Suzan McCullough, Arthur Joseph Kalhan, Satish C. |
| Copyright Year | 2001 |
| Abstract | There is a controversy in the literature as to the effects of gender on leucine kinetics. Two research groups found that men oxidize more leucine during exercise, whereas another group showed no gender effects. The purpose of our study was to examine the effects of gender on leucine and, for comparison purposes, lysine kinetics. Our subjects (n = 14) were seven matched pairs of men and women selected for their exercise habits and age. After 1 wk of a standardized diet, they exercised at 50% of maximal O(2) uptake for 1 h. There was an effect of exercise in both genders: an increased leucine oxidation and an attenuation in nonoxidative leucine disposal compared with rest (P < 0.05). Furthermore, our study confirms that there are gender differences in leucine, but not lysine, kinetics. Men had a higher rate of leucine oxidation and a lower rate of nonoxidative leucine disposal during exercise (P < 0.05). For women, a larger proportion of their exercise energy needs came from fat; for men, a greater fraction came from carbohydrate (P < 0.05). We conclude that female exercisers rely to a greater extent on fat as an energy source, thereby using less carbohydrate, amino acid, and protein as a fuel source. |
| Starting Page | II |
| Ending Page | II |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://jap.physiology.org/content/jap/91/1/357.full.pdf |
| PubMed reference number | 11408452v1 |
| Volume Number | 91 |
| Issue Number | 1 |
| Journal | Journal of applied physiology |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Amino Acids Behaviorial Habits Carbohydrates Disposal Fatty acid glycerol esters Kinetics (discipline) Large Leucine Lysine Platelet Glycoprotein 4, human Sex Characteristics oxidation |
| Content Type | Text |
| Resource Type | Article |
