No, it doesn't ever get any easier. You wouldn't want it to either." This quote by Greg Glassman, founder of says all you need to know about what some consider the most challenging fitness program ever. Instead of featuring just one activity such as running or weight-lifting, CrossFit tries to integrate and field skills, and bodybuilding into a short and intense workout. A Workout of the Day(or woD) may involve doing pushups, followed by ten pull-ups, and then an 800 meter run-then repeating the set as many times as possible in 20 minutes. Because the workouts change every day, the body does not easily adapt and is always challenged. Of course, a danger is that some people go overboard and risk or, at the very least, suffer aches and pains for a few days. But for people who like to push the limits of fitness and strength-there are many police officers, firefighters, and military people who follow it-CrossFit is the key.