Question

chris goes to the gym 5 days/week and enjoys weight lifting. chris knows the rda for protein is 0.8 grams/kg body weight, but the dietitian recommended 1.3 grams/kg body weight because chris is so active. chris weighs 154 lbs (70 kg) and eats 2000 calories a day. according to the dietitian, how many grams of protein should chris consume per day? what percent of their calories will be from protein?
a 364 grams of protein; 18.2% of calories from protein
b 91 grams of protein; 18.2% of calories from protein
c 91 grams of protein; 40.9% of calories from protein
d 364 grams of protein; 4% of calories from protein

Explanation:

Step1: Calculate protein intake

The dietitian recommended \(1.3\) grams/kg body weight. Chris weighs \(70\) kg. So protein intake is \(1.3\times70 = 91\) grams.

Step2: Calculate percentage of calories from protein

Each gram of protein has \(4\) calories. So calories from protein is \(91\times4=364\) calories. Chris eats \(2000\) calories. The percentage is \(\frac{364}{2000}\times100 = 18.2\%\)

Answer:

B. 91 grams of protein; 18.2% of calories from protein