My personal opinion from research and working out the past few months. You do not have to do three sets. Because technically each exercise is one set when it comes to abs. BUT, when working out you need to push yourself! If you do not feel it after, which I can see being possible the first week with such low amount of reps, then you do it again! If you are pushing yourself, then no matter what you do, you’re doing it right.
Don’t get so into your abs that you overlook your other muscles. You'll look better if all your core muscles are firm. That includes your glutes and back muscles. Pilates exercises are one way to work all of the core muscles, plus the arms and legs. A boot camp class or personal trainer can do the job, too. New to exercise? Start slowly. If you've got a health issue, check with your doctor first.
Dump the little pink weights. Build and shape muscle to improve the overall effectiveness of your workouts and to maintain a healthy metabolism. How much weight is enough? According to the American Council on Exercise, you should lift 70-80% of your maximum resistance to build and shape your muscles. Maximum resistance is usually defined as your “1 rep max” or the most weight you can lift in one repetition. For most people that means lifting more than the 2-3 pound little pink weights that you find in some fitness centers.
It's not just about weight loss. Having great gut health is linked to good health throughout your body. Scientists in this rapidly growing field are finding connections between gut microbes and the ;immune system, weight loss, gastrointestinal health, allergies, asthma, and even cancer. With every study that's published, scientists become more convinced that having a healthy gut leads to having a healthy body.