Sit-ups are a great exercise to get sexy six-pack Abs. In this video Bikini Models Tahiti Cora and Anais Zanotti show you how to do sit-ups with a friend.br Sexy SIX-PACK abs 10 min workout doing just Crunches and Sit-ups. Vicky Justiz does an intense ab workout for 10 min, it burns and will help you get a lean .