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Arguably CrossFit’s most famous (or infamous) WOD, Murph is the ultimate test of cardio endurance, bodyweight strength, and sheer mental fortitude. Getting through 100 pullups alone is impossible for many hardened gym-goers, let alone running a mile after 300 squats. And on the elite level, when athletes wear a 20-pound weight vest during the entire workout and do each set of calisthenics in sequence, Murph demands Herculean levels of fitness.
“This is a really hard workout,” says Dan Wells, C.P.T. (NCSA), CrossFit Level 2 trainer, owner/coach at CrossFit Horsepower in Los Angeles, and a competitor at the 2015 CrossFit Games. “For most folks, it’s longer than a 10K race, but harder.”
Murph also appeals to a slightly wider audience than do most CrossFit workouts. “I like that it’s sort of available to everybody,” Wells says. “All you need is a bar to hang from.” The running and calisthenics shift the advantage away from tank-sized weightlifters and toward lighter, more patient athletes who can whip through bodyweight exercises with an economy of motion and a minimum of psychological stress.
“You see this in the decathlon, too,” says Dr. Michael Joyner, M.D., an avid endurance athlete and a specialist in endurance exercise at the Mayo Clinic in Rochester, Minnesota. “Big power athletes like sprinters and throwers just fall apart in the 1500-meter run, while leaner, rangier athletes succeed.”
Like all of CrossFit’s so-called Hero WODs, which are named in honor of U.S. servicemen who died in action, Murph is named after Lt. Michael P. Murphy, a Navy SEAL who was killed in Afghanistan in 2005, and posthumously awarded the Congressional Medal of Honor. (Murphy’s story was portrayed in the Mark Wahlberg film Lone Survivor.) Murphy often did the workout while wearing body armor—hence the 20-pound vest and the workout’s original name, “Body Armor.”
SEAL Lt. Michael P. Murphy, from Patchogue, New York poses in Afghanistan. Murphy was killed by enemy forces during a reconnaissance mission, Operation Red Wing, June 18, 2005, while leading a four-man team tasked with finding a key Taliban leader in the mountainous terrain near Asadabad, Afghanistan. (Photo: Getty Images)
In a nod to those roots, Murph has become something of a Memorial Day tradition for CrossFit, as masochists gather in their boxes to salute America’s armed forces with the grueling endurance workout, followed by (presumably paleo) barbecues. A quick Google search for ‘Memorial Day Murph’ yields events across the U.S., plus the official Murph Challenge, which was founded by Murphy’s parents to raise money for a scholarship fund in his name.
And while Murph is hardly a stroll through the park, its red, white, and blue roots seem to ensure it has staying power.
“It’s an amazing celebration of the armed forces and people who have died for our country,” Wells says. “It’s my oldest son’s birthday, and he can finally do pushups and pullups now. So I’m going to put on a 30-pound vest, and my son and I are going to do it together.”