One exercise you’ll likely see popping up on “slim-waist workouts” is the Russian twist. While it is a great core strengthening exercise that gives your oblique muscles (which run down the side of your abdomen) a workout, they won’t make your waist smaller.
“You can't spot reduce fat, meaning you can't target where you lose fat from,” says qualified personal trainer and founder of Another Round, Max Cotton.
“Stick to your calorie deficit and you will lose the fat [around your waist] eventually. Targeted ab exercises won't reduce any more fat than other exercises, but it can help train the muscle in your abs.”