About 0.75 grams protein per pound body weight (1.5 grams protein per kilogram) is a more-than-adequate intake for both types of athletes. While this need might be slightly higher if the athlete is dieting (restricting calories), new to lifting weights, or is in a growth spurt, one gram of protein per pound (2.0 g pro/kg) is the maximum an athlete can use per day to build muscle.

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Now let’s do some math:

140 pound runner = 106 g protein/day

240 pound body builder = 180 g protein/day

Both runners and bodybuilders can easily consume that amount of protein by enjoying a protein-rich food with each meal. Here are three easy ways to pump protein into your sports diet:

Cottage cheese, 1 cup: 30 g

Tuna, 5-ounce can: 25 g protein

Chicken breast, 6 ounces: 50 g

Because a hungry 240-pound bodybuilder can devour a 16-ounce (two cup) tub of cottage cheese (60 g pro) and a few cans of tuna (50 g pro) for a mere snack, and consume two chicken breasts (100 g pro) at dinner, he’ll match his protein requirements without needing supplements. The runner can also easily consume an abundance of protein via meals and snacks.

I vote for more focus on real foods instead of commercial protein powders, bars and shakes. Food works!

For more information:

If you have doubts about your protein intake, please refer to the chapter on protein in Nancy Clark’s Sports Nutrition Guidebook .

Nancy Clark is a Boston-based sports dietitian and contributor for Sporting News. Her Sports Nutrition Guidebook has sold more than half a million copies. Read more on her website and follow her on Twitter @nclarkrd