Post by Admin on Jan 5, 2014 17:14:44 GMT
PROTEIN
Protein is probably the single most important macronutrient for the purposes of maintaining muscle on a diet. Dietary protein is hydrolyzed (broken down) into it’s constitutive amino acids during digestion. These amino acids are released into the bloodstream where they may then be taken up by cells (usually muscle cells). Dietary protein is also very important as amino acid availability is the single most important variable for protein synthesis to occur. This means that protein synthesis increases in a linear fashion (directly proportional to plasma amino acid concentrations) until the plasma amino concentrations are approximately twice that of normal plasma concentrations. To generalize for the less scientifically inclined, ingesting enough dietary protein is very important for someone who is looking to gain muscle, or maintain it while dieting. Dietary protein spares muscle by helping increase protein synthesis (and thus induce net muscle gain) and by acting as a muscle sparing substrate as it can be used for glucogensis (synthesis of glucose). Dietary protein however, is not as muscle sparing as are carbohydrates when used as a substrate for glucose synthesis. Protein is also a very “expensive” molecule for your body to use as energy.
The body would much rather store amino acids than oxidize them as protein oxidation yields less net ATP produced per amino acid when compared to fat or carbohydrates. Therefore, it can be stated that dietary protein has a thermogenic effect on the body.
Protein Intake
The “golden standard” protein intake for an athlete or someone looking to alter physique is around 1 g/lb of bodyweight. This will need to be increased while dieting. Protein is a thermogenic macronutrient key in sparing muscle tissue when in a caloric deficit (see aforementioned section on protein).
Mesomorphs – 1.2g/lb – 1.3g/lb.
Ectomorphs – 1.4g/lb – 1.6g/lb.
Endomorphs – 1.4g/lb – 1.5g/lb.*
For our subject, this equates to a protein intake of around 240-260 g protein per day. Let’s go ‘middle of the road’ and set the subjects protein intake at 250 g protein per day. This means 1000 kcals have been devoted to protein intake, leaving us with 1400 kcals for fat and carbohydrate intake.
Protein is probably the single most important macronutrient for the purposes of maintaining muscle on a diet. Dietary protein is hydrolyzed (broken down) into it’s constitutive amino acids during digestion. These amino acids are released into the bloodstream where they may then be taken up by cells (usually muscle cells). Dietary protein is also very important as amino acid availability is the single most important variable for protein synthesis to occur. This means that protein synthesis increases in a linear fashion (directly proportional to plasma amino acid concentrations) until the plasma amino concentrations are approximately twice that of normal plasma concentrations. To generalize for the less scientifically inclined, ingesting enough dietary protein is very important for someone who is looking to gain muscle, or maintain it while dieting. Dietary protein spares muscle by helping increase protein synthesis (and thus induce net muscle gain) and by acting as a muscle sparing substrate as it can be used for glucogensis (synthesis of glucose). Dietary protein however, is not as muscle sparing as are carbohydrates when used as a substrate for glucose synthesis. Protein is also a very “expensive” molecule for your body to use as energy.
The body would much rather store amino acids than oxidize them as protein oxidation yields less net ATP produced per amino acid when compared to fat or carbohydrates. Therefore, it can be stated that dietary protein has a thermogenic effect on the body.
Protein Intake
The “golden standard” protein intake for an athlete or someone looking to alter physique is around 1 g/lb of bodyweight. This will need to be increased while dieting. Protein is a thermogenic macronutrient key in sparing muscle tissue when in a caloric deficit (see aforementioned section on protein).
Mesomorphs – 1.2g/lb – 1.3g/lb.
Ectomorphs – 1.4g/lb – 1.6g/lb.
Endomorphs – 1.4g/lb – 1.5g/lb.*
For our subject, this equates to a protein intake of around 240-260 g protein per day. Let’s go ‘middle of the road’ and set the subjects protein intake at 250 g protein per day. This means 1000 kcals have been devoted to protein intake, leaving us with 1400 kcals for fat and carbohydrate intake.