Tried flutter kicks for a month and wow—my lower abs have never felt stronger! The first week was rough (hello, 10-second struggle), but by week four, I was crushing 40-second sets. Not only did my core get way tougher, but my hips loosened up too. Pro tip: focus on form, not just time, and don’t skip rest days. If you want a simple move that seriously levels up your core, flutter kicks are it! Might even add ankle weights next time. #FitnessChallenge #CoreWorkout #FlutterKicks #Fitness