Master the V-Ups exercise for a shredded core.

Target your rectus abdominus, the outwardly showing “6-pack” portion of your abs, with an advanced abdominal move, the V-up. Are crunches a bore for you? You can do 1,000 of them and you aren’t seeing results. If you already have a significantly solid mid-section, it’s time to take the next step in core training, move on up to the v-up. V-ups are excellent because they work your entire core including your abs and lower back. Secondarily they target your obliques and quads. Plus, they help with your flexibility.https://www.youtube.com/watch?v=wRCgPeligF4
Make it easier:If you want to work your way up to the full v-up, you can do this exercise one leg at a time. You will still reach up with both hands, but alternate legs between repetitions.Make it harder:To make the exercise more difficult, do not let your feet or the back of your hands touch the floor when you lay back down. This keeps your abdominals under constant tension.