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A few years ago, longtime CrossFit athlete Adam Klink set a certain corner of the internet ablaze when he ran a sub-five-minute mile and hit a 500-pound back squat in the same day. Either of those numbers could be a personal record of a very fit person, but to Klink, it was the combination that exemplified the CrossFit philosophy. âItâs that mindset of not being amazing at one thing but good at everything,â he tells GQ.
What began as a personal quest caught on, and Klink published his training plan to create the 10-week Run Fast, Squat Heavy program, which has since captured the attention of runners, lifters, and the âhybridâ athletes who do both.
Perhaps the reason Klinkâs accomplishment so captivated the fitness world was because running fast and squatting heavy are largely seen as incompatible. And in some ways, they are. Lifting heavy weights builds fast-twitch muscle fibers, which power short bursts of energy and fatigue quickly, says Nânamdi Nelson, an exercise physiologist at NYU Langoneâs Sports Performance Center. If you focus on building that capacity, you run the risk of ignoring the slow-twitch muscles that power endurance efforts. âItâs like a seesaw,â Nelson says. âAs you get stronger, itâs going to be difficult to also keep the endurance up.â
Difficult, but as Klink proved, not impossible. Want to try running fast and squatting heavy? Hereâs what experts say about who the program is right for, and what you should know before you start.
Itâs not for beginners.
Before you try to run fast and squat heavy together, you should ideally be able to run relatively fast and squat relatively heavy separately. Casey Johnston, who writes the Sheâs a Beast newsletter, and who tried Run Fast, Squat Heavy last year, suggests that if youâre new to either running or lifting (or both), you take time to build proficiency and conditioning before attempting a program like this.
Set your goal wisely.
Thereâs a beautiful symmetry to Klinkâs goal of a sub-five-minute mile and a 500-pound squat. But those numbers will be out of reach for most, and Klink says that his program is intended for athletes to set their own goal based on a one-mile time trial and a current one-rep max.
Figuring out just how much those numbers will progress in 10 weeks isnât always straightforward, so Nelson recommends recruiting a coach to help. And when in doubt, aim conservative.
Prioritize recovery.
Klink says the biggest challenge of the training plan was avoiding injury. He credits his success to recovering well during training: He stretched daily, used recovery boots, tooks cold baths, and soaked in Epsom salts. Following the warm-ups and cool-downs prescribed in the program is also key, he says, as is prioritizing sleep and nutrition.