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28 Sep 2018

How to calculate rumen unegradable protein when given Crude protein % of a diet and rumen degradable protein %. Also how to calculate total dietary protein consumed by a cow?

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Related questions

1. Oxidation of 1g carbohydrate, fat and protein yields 0.56, 1.07, and 0.42 g metabolic water respectively. Retention of 1g of dietary protein yields 0.16 g metabolic water whereas 0.07g of water is prduced when 1 g of dietary fat and carbohydrate, respectively, are retained as fat.

For a lactating cow consuming 15 kg DM/day and feed contains 76% carbohydrate, 4% fat, and 14% crude protein;

How much metabolic water will the cow produce under the following scenarios:

(i) If 65% of carbohydrate, 70% fat, and 60% crude protein is oxidized?

(ii) If 15% of crude protein, 15% fat, and 12% carbohydrate is retained?

Bob is a high intensity endurance athlete and very focused on his nutrition. He recently met with a registered dietitian to learn more specifically about his protein needs. His registered dietiitan explained that protein requirements can vary from person to person based on body weight and type of physical activity. Bob informs his dietitian that he is 20 years old, 5'10" tall and weighs 180 pounds.

Based on this information, please answer the following questions:

1. What is the Recommended DIetary Allowance (RDA) for protein and how is this number different in comparison to current recommendations for a high intensity endurance athlete?

2. Calculate Bob's protein requirements according to the recommendations for a high intensity endurance athlete (Please show the steps you took to determine Bob's protein needs).

3. Bob is wondering what foods are good sources of protein and more specifically contain high quality protein. Please list 3 sources of high quality protein.

1. Jamar is a competitive weight lifter (Olympic lifting). He trains every day in the weight room 1.5 – 2 hours six days a week. He eats home-cooked, well-balanced meals for breakfast and supper. At breakfast, he also drinks a mega-protein supplement that supplies 56 grams of protein. For school, he packs his own lunches, which usually include two tuna or chicken sandwiches with potato chips and milk. He also has a midmorning and mid afternoon snack, which typically consist of a protein bar (24 grams of protein per bar). He works out in the high school weight room two to three times per week in the late afternoon. When he arrives home, he studies until the family eats supper around 7 p.m. His final snack of the day occurs just before bedtime when he consumes a mega-protein supplement that supplies 56 grams of protein.

1.1 Is Jamar consuming enough dietary protein to achieve his goals?

1.2 What are the recommended protein intake guidelines for an athlete who wants to gain weight?

1.3 Is it detrimental to consume too much protein?

1.4 What should Jamar’s protein intake be for his training?

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