I first heard about Chloe Ting [1] from a friend who posted progress pics after completing Ting's free 21-Day Get Fit Challenge [2]. I was floored by her results, which inspired me to try this 10-minute ab workout. I row and do yoga daily, so I wasn't ready to commit to a two- or three-week challenge. But I had been neglecting working my core over the past few months, feeling weak and experiencing lower-back pain. Per my physical therapist's recommendation to strengthen my core, I decided to devote two weeks (four to five times per week) to this one workout. Keep reading to find out all the benefits I experienced.
