I recommend doing the V-trunk twist with a 3-10lb small to medium weight or small medicine ball. Try 3 x10-15 reps per side, 3xs a week to start. NOTE: Always do 15-30mins of cardio to warm your body up before doing this exercise every time. This exercise is best done in the middle or near the end of your workout. This will help you to look great from ANY camera angle and position : ) Oblique training helps to highlight a fine sculptured physique from every angle possible.