If You want to have muscle abs and slim waist You must do exercises on this part of the body. You try this training and You do 40 seconds workout and 20 seconds rest. You have to do 10 exercises: Ab wing flab, Player crunch, Single leg raise, Leg raise hold, Reverse crunch, Leg extension to 3 points, Plank step, Slow mountain climber, Side plank + dip right and Side plank + dip left.
