Celeb Trainer Shows How to Make Crunches WAY More Effective (and Less Uncomfortable!) – POPSUGAR

Celeb Trainer Shows How to Make Crunches WAY More Effective (and Less Uncomfortable!)
POPSUGAR
When we spoke to Anna Kaiser, the mastermind who sculpted Shakira's body (among those of many other celebs), we wanted to know two things: how to get a stronger, more toned booty and the best way to build rockin' ab muscles. She shared three of her …