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http://dx.doi.org/10.3181/00379727-116-29359 | DOI Listing |
Front Nutr
April 2024
Department of Physical Performance, Norwegian School of Sport Sciences, Oslo, Norway.
[This corrects the article DOI: 10.3389/fnut.2024.
View Article and Find Full Text PDFFront Nutr
February 2024
Department of Physical Performance, Norwegian School of Sport Sciences, Oslo, Norway.
Introduction: Carbohydrates and fats are the primary energy substrates during exercise, but proteins can also contribute. When proteins are degraded in the body, the amino groups are mainly converted to urea and excreted. Therefore, nitrogen excretion has been used as a marker of protein degradation, but a clear conclusion has yet to be reached on the effect of exercise on nitrogen excretion.
View Article and Find Full Text PDFJ Dairy Sci
July 2024
Department of Animal and Dairy Sciences, University of Wisconsin-Madison, Madison, WI 53706. Electronic address:
Our objectives were to determine the effects of reducing dietary CP concentration on nutrient digestibility, rumen function, N balance, and serum AA concentration for dairy cows in late lactation. At the initiation of the experimental period, we stratified Holstein cows (n = 128; mean ± SD 224 ± 54 DIM) by parity and days pregnant (86 ± 25 d) and assigned them to 1 of 16 pens. For 3 wk, all cows received a covariate diet containing 16.
View Article and Find Full Text PDFBackground: Regarding changes in muscle mass, differences due to types of exercise and/or nutritional interventions, and associations with nutrient balances are still unclear.
Methods: To estimate changes in muscle mass during a body weight loss program using either a diet or exercise regimen, we investigated levels of muscle mass-related indices, and body contents of nitrogen, sodium, and potassium as measured by the balance method. Six healthy young adult male volunteers participated in two 10-day crossover experiments (20 days total).
Med Sci Sports Exerc
December 2023
Department of Physical Performance, Norwegian School of Sport Sciences, Oslo, NORWAY.
Introduction: Exercise with low carbohydrate availability increases protein degradation, which may reduce subsequent performance considerably. The present study aimed to investigate the effect of carbohydrate ingestion during standardized exercise with and without exhaustion on protein degradation and next-day performance.
Methods: Seven trained male cyclists (V̇O 2max 66.
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