There are about half a dozen diets that are very similar. They all recommend you eat "meat and veg" The reason Whole 30 works for me is because you can have potatoes and fruit. An example of a whole 30 meal would be: 2 pork chops, mashed potatoes made with chicken stock, green beans, finish with your choice of fruit. My favorite is a few grapes or pineapple chunks. Also the goal it to make it 30 days without cheating. There have been several times I would think: OK I can't cheat now I only have __ more days to go. Having an end in site helped me. When I started adding back in food groups after the 30 days. I figured out that I do not do well with Dairy. Now the only dairy I use is real butter. I never thought I could live without cheese... But now I don't think it's a good idea for me. So it helps you figure out what you can and can not eat and still feel good.
With a very simple shift we not only remove the foods that are at odds with our health (grains, legumes, and dairy) but we also increase our intake of vitamins, minerals, and antioxidants. Here is a great paper from Professor Loren Cordain exploring how to build a modern Paleo diet: The nutritional characteristics of a contemporary diet based upon Paleolithic food groups. This paper also offers significant insight as to the amounts and ratios of protein, carbohydrate and fat in the ancestral diet.
Joel Runyon is the founder of Ultimate Paleo Guide and CEO of Paleo Meal Plans. He's a precision nutrition, and Gym Jones Level 1 certified, and helped millions of people get healthy and lose weight since 2012. Joel is also an ultra runner and endurance athlete - and in 2017, he became the the youngest person to run an ultra marathon on every continent in the world to build 7 schools with Pencils of Promise in developing countries.Follow him on Twitter, Instagram, Athlinks and read his full bio here.
Grass-fed meat is recommended on the paleo diet because it is leaner than meat from grain-fed animals and has more omega-3 fatty acids, the healthy fats that reduce inflammation in the body and protect your heart. A typical American diet is high in saturated and trans fats and lower in healthy poly- and monounsaturated fats, hence the paleo diet's emphasis on grass-fed meats.
This 2003 CrossFit Journal article captures an early conception of a universal, multi-event test of fitness that laid the foundation for CrossFit competition, including what would become the CrossFit Open and the CrossFit Games. The design requirements for such a test "included but were not limited to the following: quantifiable results; consistency with the CrossFit fitness concept; raising our commitment to improving absolute strength, relative strength, and gymnastic foundations; balancing intrinsic abilities of smaller and larger athletes; emphasizing exercises critical to and foundational to advanced training; mixing training demands within each test and, of course, over the total competition; a design that would identify an athlete’s weaknesses and possibly stand as a workout plan for improving overall fitness; and, finally, we wanted to design a competition that would be 'hard as hell.'"