期刊
JOURNALS OF GERONTOLOGY SERIES A-BIOLOGICAL SCIENCES AND MEDICAL SCIENCES
卷 65, 期 10, 页码 1068-1076出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/gerona/glq123
关键词
Aerobic exercise; Protein intake; Frailty
资金
- Colorado Agriculture Experimental Station [COL00604]
- National Institute on Aging [K01AG031829-01]
- University of Colorado Denver Clinical and Translational [1UL1 RR025780]
To explore whether nitrogen retention can differ on an isonitrogenous diet by changing when protein is consumed, we performed a short-term study in older individuals (64.5 +/- 2.0 years) performing daily exercise while in energy balance. Participants consumed an isonitrogenous-isocaloric diet with the timing of a protein or carbohydrate beverage after exercise (protein after exercise [PRO], carbohydrate after exercise [CHO]) versus earlier in the day. Three-day mean energy balance (PRO: 202 +/- 36 kcal and CHO: 191 +/- 44 kcal; p = .68) did not differ between trials, but 3-day mean nitrogen balance was significantly more positive in the PRO (1.2 +/- 0.32 g N) trial than the CHO trial (0.8 +/- 0.45 g N; p < .05). Older individuals were better able to maintain nitrogen balance by simply changing when a portion of an identical amount of daily protein was consumed.
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