Short compilation of four quite advanced abs exercises. If you feel like your core strength is relatively good give them a go. However, if you feel your lower back while doing them think of regressing to less demanding movements, build the stability and strength first and avoid complications and injuries. . Don't rush on your journey to have a flat belly and bear in mind none of those exercises will have any major impact on the shape of your stomach. 80% of your success is balanced diet, slight calorie deficit (if you need to lose few pounds first) and the right combination of strength training and cardio. . The chance that you reach your goals in as short time as possible is hundred times bigger when you know what to eat and what workouts to do. Don't waste another six months and message me for nutrition and training plan now 💪 . . .