If it feels like you’ve been noticing more bodyweight exercises on your social feeds—the kinds of calisthenics exercises your grandparents might have done in gym class—you’re not imagining things. Fitness, like fashion, is cyclical. As sure as skinny jeans will be cool again, you can bet that training styles like calisthenics will always come back around. But this isn’t about nostalgia. Whether we’re talking about bringing back your grandfather’s workout or his gym shorts, it has to hold up in the present day. And in the case of calisthenics, it totally makes sense why this is happening right now. “I see calisthenics trending upwards, and I think some of that has to do with what’s happened the last five years or so,” says Dogpound founder and celebrity trainer Kirk Myers, referring to the surge of connected fitness and smart home gyms brought on by the pandemic. The pendulum, it seems, is swinging the other way. “I feel like because technology is such a large part of our lifestyle now, people are trying to get back …