A great fitness tool for balance, the bosu is also great for ab and core work!
Some people like to do hundreds of crunches every day. It helps them to focus on the number, the burn, and the results they have obtained in the past. Doing fewer crunches might make them nervous that they aren’t doing enough. But do you need to do hundreds of crunches each day? Not necessarily. But again it depends on your goals. Not everyone has the same goal, so you should train according to the outcome you desire, along with a basic understanding of the results you can expect from the exercises and form you choose.
If you’re a beginner who has been sedentary for months or even years, I recommend setting a goal of a short duration of time and consistency. If you have not worked out at all, and you want to start working on your abs, setting a goal to exercise 6 or 7 days a week might be unrealistic. You don’t want to set yourself up to fail. Set smaller goals and allow yourself to succeed at accomplishing them consistently. Aim to work out 3 to 4 days a week for maybe 15 to 20 minutes each time. Once you can do that for 3 to 4 weeks, increase one element of your program.
If you’re an advanced exerciser and already work out 1 hour, 4 or 5 days a week, you may want to adjust your form, slow down your movement, and not change anything else. The great thing about creating your own exercise program is that you can design it to fit your life and your goals. Most people do not stick to certain programs because there are too many obstacles to overcome. There is no absolute amount of exercise that has to be done, so you can have full control over how much and how often you exercise.