protein 1

Question 1

what is the source of nitrogen in the body ?

Answer 1

amino acids ( protein )
6.25 g protein= 1g nitro

Question 2

what is the most commonly used method for assessing protein requirements ?

Answer 2

nitrogen balance
nitrogen intake ( protein intake / 6.25 ) - nitrogen excretion

Question 3

what is the protein reference nutrient intake?

Answer 3

0.75 g/kg/day

Question 4

what is extra protein needed for ?

Answer 4

• increased synthesis of new proteins ( myofibrillar for muscle growth and mitochondrial biogenesis )
• rebuilding and remodeling proteins damaged by exercise
• replacement of proteins broken down and oxidised for energy

Question 5

when is protein balance achieved for endurence trained athletes ?

Answer 5

1.37 g/kg/d
safe intake at 1.6g/kg/d
for women 1.6 g/kg/d

Question 6

protein guidlines for exercisers

Answer 6

low to moderate: general population amount
modestly trained : negative N balance at 1 g/kg/d so need 1.1 g/kg/d
elite : n balance achieved at 1.4 g/kg/d

Question 7

what is the safe intake for resistance exercisers

Answer 7

safe inatke estimated at 1.33 g/kg/d

Question 8

what are the limitations of N balance ?

Answer 8

• no info of tissues
• lack of sensitivity
• 0 balance on low intake may reflect on accommodation
• • balance may not relate to lean body mass

Question 9

protein does enhance lean mass and strength gains in resistance training

Answer 9

yup

Question 10

factors that determine the utilization of amino acids

Answer 10

• dose
• type of protein/amino acids
• other nutrients ingested concurrently
• exercise
• timing of ingestion in relation to exercise