SQUATS> CRUNCH ES “Sit-ups? Sit down!” — Who needs core work when the squat is the ultimate, bro-approved six-pack chiseller? Turns out we all do. “Just because you’re strong or have a big squat or deadlift, that doesn’t mean you won’t benefit,” Gentilcore says. “It could be your hip flexors or back muscles doing all the heavy lifting in the first place, so factor in five minutes of abs work at the end of every session.” We call that crunch time.