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Diet and exercise are both good ways to lose weight, but something like crunches probably aren't the best idea to lose weight without some type of cardio. If you just want to lose weight, I would suggest at least 10 or 15 minutes of cardio exercise a day, whether it be running, doing jumping jacks, whatever.. As long as it gets your heart pumping. In the lines of crunches, if you are specifically trying to target your stomach and midsection, do as many crunches as you can until it starts to burn, and then do about half as many more. If you don't feel the burn, you're not helping yourself any (no pain, no gain - right?). Don't just do straight crunches, either, try situps, and even pushups if possible to work more of your torso. Every person is different, so I can't say whether or not crunches will even help, at 12, your body may not be ready for muscle development, so you won't have a 6 pack, but anything that burns calories will help you lose weight. Just eat healthy, and do a good amount of cardio. Try doing some crunches before AND after as a warm up and a cool down. Oh and don't forget to stretch! It sounds silly, but you will be happy in the morning when you aren't half as sore as you could have been!

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16y ago

What else can I help you with?