The CrossFit dietary prescription is as follows:
should be lean and varied and account for about 30% of your total caloric load.
should be predominantly low-glycemic and account for about 40% of your total caloric load.
should be predominantly monounsaturated and account for about 30% of your total caloric load.
should be set at between .7 and 1.0 grams of protein per pound of lean body mass depending on your activity level. The .7 figure is for moderate daily workout loads and the 1.0 figure is for the hardcore athlete.
Nutrition is a very important aspect of our day to day functions and most definitely cannot be overlooked. Your body needs the correct nutrients in order to avoid injuries and health issues. Whether you are trying to lose the tire around your waist, trying to rip the shirt off your shoulders by just flexing, or just maintaining the sexiness you already see in the mirror every 15 minutes; a balanced nutritious diet must be consumed.
The question is always asked. How much is enough protein. The following link from WebMD should be a great start for guiding you in the right direction. Other factors play a role as in physical activity, etc.
What Should I Eat?
In plain language, base your diet on garden vegetables, especially greens, lean meats, nuts and seeds, little starch, and no sugar. That's about as simple as we can get. Many have observed that keeping your grocery cart to the perimeter of the grocery store while avoiding the aisles is a great way to protect your health. Food is perishable. The stuff with long shelf life is all suspect. If you follow these simple guidelines you will benefit from nearly all that can be achieved through nutrition.
The Caveman or Paleolithic Model for Nutrition
Modern diets are ill suited for our genetic composition. Evolution has not kept pace with advances in agriculture and food processing resulting in a plague of health problems for modern man. Coronary heart disease, diabetes, cancer, osteoporosis, obesity and psychological dysfunction have all been scientifically linked to a diet too high in refined or processed carbohydrate. Search "Google" for Paleolithic nutrition, or diet. The return is extensive, compelling, and fascinating. The Caveman model is perfectly consistent with the CrossFit prescription.
What Foods Should I Avoid?
Excessive consumption of high-glycemic carbohydrates is the primary culprit in nutritionally caused health problems. High glycemic carbohydrates are those that raise blood sugar too rapidly. They include rice, bread, candy, potato, sweets, sodas, and most processed carbohydrates. Processing can include bleaching, baking, grinding, and refining. Processing of carbohydrates greatly increases their glycemic index, a measure of their propensity to elevate blood sugar.
What is the Problem with High-Glycemic Carbohydrates?
The problem with high-glycemic carbohydrates is that they give an inordinate insulin response. Insulin is an essential hormone for life, yet acute, chronic elevation of insulin leads to hyperinsulinism, which has been positively linked to obesity, elevated cholesterol levels, blood pressure, mood dysfunction and a Pandora's box of disease and disability. Research "hyperinsulinism" on the Internet. There's a gold mine of information pertinent to your health available there. The CrossFit prescription is a low-glycemic diet and consequently severely blunts the insulin response.
Caloric Restriction and Longevity
Current research strongly supports the link between caloric restriction and an increased life expectancy. The incidence of cancers and heart disease sharply decline with a diet that is carefully limited in controlling caloric intake. “Caloric Restriction” is another fruitful area for Internet search. The CrossFit prescription is consistent with this research.
The CrossFit prescription allows a reduced caloric intake and yet still provides ample nutrition for rigorous activity.
According to Dave Castro of CrossFit - the Paleo and Zone Communities can co-exist.....
The Paleo Diet is based upon everyday, modern foods that mimic the food groups of our pre-agricultural, hunter-gatherer ancestors. The following seven fundamental characteristics will help to optimize your health, minimize your risk of chronic disease, and lose weight.
Higher protein intake – Protein comprises 15 % of the calories in the average western diet, which is considerably lower than the average values of 19-35 % found in hunter-gatherer diets. Meat, seafood, and other animal products represent the staple foods of modern day Paleo diets.
Lower carbohydrate intake and lower glycemic index – Non-starchy fresh fruits and vegetables represent the main carbohydrate source and will provide for 35-45 % of your daily calories. Almost all of these foods have low glycemic indices that are slowly digested and absorbed, and won’t spike blood sugar levels.
Higher fiber intake – Dietary fiber is essential for good health, and despite what we’re told, whole grains aren’t the place to find it. Non-starchy vegetables contain eight times more fiber than whole grains and 31 times more than refined grains. Even fruits contain twice as much fiber as whole grains and seven times more than refined grains.
Moderate to higher fat intake dominated by monounsaturated and polyunsaturated fats with balanced Omega-3 and Omega-6 fats – It is not the total amount of fat in your diet that raises your blood cholesterol levels and increases your risk for heart disease, cancer, and type 2 diabetes, but rather the type of fat. Cut the trans fats and the Omega-6 polyunsaturated fats in your diet and increase the healthful monounsaturated and Omega-3 fats that were the mainstays of Stone Age diets. Recent large population studies known as meta analyses show that saturated fats have little or no adverse effects upon cardiovascular disease risk.
Higher potassium and lower sodium intake – Unprocessed, fresh foods naturally contain 5 to 10 times more potassium than sodium, and Stone Age bodies were adapted to this ratio. Potassium is necessary for the heart, kidneys, and other organs to work properly. Low potassium is associated with high blood pressure, heart disease, and stroke – the same problems linked to excessive dietary sodium. Today, the average American consumes about twice as much sodium as potassium.
Net dietary alkaline load that balances dietary acid – After digestion, all foods present either a net acid or alkaline load to the kidneys. Acid producers are meats, fish, grains, legumes, cheese, and salt. Alkaline-yielding foods are fruits and veggies. A lifetime of excessive dietary acid may promote bone and muscle loss, high blood pressure, and increased risk for kidney stones, and may aggravate asthma and exercise-induced asthma.
Higher intake of, vitamins, minerals, antioxidants, and plant phytochemicals – Whole grains are not a good substitute for grass produced or free ranging meats, fruits, and veggies, as they contain no vitamin C, vitamin A, or vitamin B12. Many of the minerals and some of the B vitamins whole grains do contain are not well absorbed by the body.