Progress rarely looks like a steady climb, and Erin’s story proves it with a quiet honesty that a lot of women recognize but rarely say out loud. Mostly Erin focused on cardio as her trusted way of staying active—jogs, hikes, bike rides, long walks —until back pain kept pushing her to the couch and frustration kept pushing her into a loop of “eat a little less, walk a little more.” The missing piece wasn’t to keep doing the same thing, it was to bravely try something new. Erin walked in...