2. Ab Plank is a great exercise to really challenge your entire core and build up your strength and endurance. The Plank works the lower abdomens, the oblique muscles and your lower back. It takes focus and concentration plus some upper body strength. Start with holding the plank position for 30- 40 seconds and build your way up. You will be amazed at how strong your cores will get by doing this exercise regularly.
During the first week of a reduced calorie and carbohydrate diet, you will flush a lot of excess water and lose weight rapidly. This is neither unhealthy, nor an indication of what your rate of weight loss will be like during weeks 2 and 3. With that said, men should expect to see an 8 to 12 pound loss during these 3 weeks, and women will likely lose 5 to 10 pounds.
Here's something else most people probably don't know: Fidgeting is good for you. It's considered a nonexercise physical activity, and it's an important way to burn energy. You get more health benefits if, in addition to exercising, you are a more fidgety, more active person the rest of the day. This means gesturing while you're talking, tapping your foot, just moving around.