A strong core is also one of the best treatments for back pain. The Best Ab Exercises for Every DecadeReady to start your journey to stronger (slightly flatter) abs? The Ab Workout for Your 40sJust like it pays to tweak your cardio and strength-training workouts, it’s also a smart move to continue evolving how you work out your abdominals. The Ab Workout for Your 50sAll core work is beneficial, but focusing on deep core moves can help strengthen not only your abdominal muscles, but your pelvic floor muscles as well. The Ab Workout for Your 70sYou can still get a great core workout in even if your mobility or balance isn’t what it was a decade or two ago.