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Muscles are composed of protein. The most common reason people take protein supplements is to build muscle. If you work out for muscle growth, more protein in your diet is essential.
Daily Protein Requirement
The U.S. RDA of protein per kilogram of body weight is .8 grams.
Weightlifting Protein Requirements
There is no official source that mandates how much protein is required for weightlifting. However, in order to gain muscle mass, the body needs additional protein. Usually, 1 1/2 grams per day will suffice.
Muscle and Protein
Muscles cannot grow without protein. Nevertheless, it isn't good to take too much protein. Your regular diet most likely has enough protein to keep your muscles in shape. If you lift weights, you can eat some more meat or drink more milk.
Whey Protein
Protein supplements that are sold as "whey protein" are basically powdered milk with a concentrated amount of calories from protein. The recommended daily amount of whey protein is stated on the bottle.
Protein for Bodybuilding
Bodybuilders should match their level of protein to the intensity of their workout. Usually, they eat as much as 2 grams of protein per kilogram of body weight.
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