In 2011, ESPN began to broadcast the CrossFit Games, with live coverage streamed through ESPN3, and some television coverage on ESPN2. As the event grew, ESPN expanded its television coverage; in 2014, the network entered into a multi-year deal to continue broadcasting the CrossFit Games, and coverage expanded to nine-and-a-half hours on ESPN and ESPN2 by 2015. In 2017, the event began a new broadcast arrangement with CBS Sports, with television coverage on CBS Sports Network, and a total of 40 hours of digital streaming coverage. CrossFit also streamed coverage through Facebook and their website.
The theory is our bodies were designed, and still optimized, to eat what our Paleolithic ancestors ate. Like your hunger-gatherer forefathers, on Paleo you get all the meat from wild animals and unlimited fruits and vegetables you can eat. But no starchy vegetables (like potatoes), no legumes (like lentils or beans), no wheat, and no grains (like quinoa or corn) because those plants were invented by human beings during the agricultural revolution after our Paleolithic ancestors left the planet. You get one cheat day where you can eat whatever you want (“Occasional cheating and digressions may be just what you need to help you stick to the diet.”) No oil because it puts omega 6 and omega 3 ratios out of whack which should never exceed 2:1, except olive oil if you must. Dairy is also prohibited. And meat must come from animals that weren’t fed grains (like corn) because grains lead to inflammation and increased fat.
This biggest success of Week 2 was attending a happy hour networking event completely sober. I headed there with a friend who was also doing Whole30, and we vowed to be each other's support system. We ordered seltzer waters together and proudly said no to the cheeseburger sliders and cheese board. Leaving the event, I felt empowered knowing I had it in me to refuse alcohol and fatty food, something I'd never tried before. Plus, I now knew I didn't have to use alcohol as a social crutch.
Grass-fed beef is often highlighted on the diet, which is promoted to contain more omega-3 fats than conventional beef (due to being fed grass instead of grain). It does contain small amounts of alpha-linolenic acid (ALA), a precursor to EPA and DHA. However, only a small proportion of ALA can be converted in the body to long-chain omega-3 fatty acids (EPA and DHA). The amount of omega-3 is also highly variable depending on the exact feeding regimen and differences in fat metabolism among cattle breeds.  In general, the amount of omega-3 in grass-fed beef is much lower than that in oily marine fish.  Cooked salmon contains 1000-2000 mg of EPA/DHA per 3-ounce portion, whereas 3 ounces of grass-fed beef contains about 20-200 mg of ALA.
It seems unlikely, from today's perspective, that a rudimentary site featuring a daily workout, a daily link to other fitness sites, and occasionally a photo of an athlete could generate a passionate viral following.But then you probably haven't tried a WOD. To a skeptical initiate, the commitment to the WOD seems odd: It might be just 10 minutes of alternating five reps of deadlifts with 100-yard sprints. Simple enough, you think, as you picture yourself running around like a beheaded, powerlifting chicken. (In conventional gyms, CrossFit workouts draw stares.) But when you actually do that workout, halfway through you hit the baptismal version of what early CrossFitters fondly called the mess-you-up moment--the recognition that there's devilish magic in this offbeat combination. In a few minutes, you're the sorest you've been in years. You're not sure you will survive. It's an adrenaline rush. For anyone bored with standard weights routines or the elliptical, it's addictive.
CrossFit is promoted as both a physical exercise philosophy and a competitive fitness sport, incorporating elements from high-intensity interval training, Olympic weightlifting, plyometrics, powerlifting, gymnastics, girevoy sport, calisthenics, strongman, and other exercises. It is practiced by members of over 13,000 affiliated gyms, roughly half of which are located in the United States, and by individuals who complete daily workouts (otherwise known as "WODs" or "workouts of the day"). CrossFit has been criticized for allegedly causing people to suffer from unnecessary injuries and exertional rhabdomyolysis.