I need to lose 15 lbs!!?

I've started riding a stationary bike. I'm going to do it every day for 40 minutes (that's how long it took me to burn 300 calories according to the bike). Then I do 100 crunches after that (20 reps 5 times resting about 1 minute in between). If I do this everyday and eat healthfully how long would it take to lose 15lbs? I'm 5'3 and 130lbs by the way and I'm 21.

i lost 10lbs just by gettin rid of the yeast in my stomach, dont eat dairy products for 6 weeks and take a natural called florastor

It sounds like you're on the right track to losing the 15 pounds. However, in order to burn fat efficiently, you have to add more variety to your aerobic training. For example, you can ride your stationary bike on Monday, run on a soft surface like grass on Tuesday, and swim on Wednesday. But you won't lose that much body fat from just riding a stationary bike, you have to make sure that you are sweating a lot. That way, you know you're burning a lot of calories. Crunches aren't really necessary to do to lose body fat, unless you won't your abs to show in the future. Also, you have to make sure you are eating very well and that your nutrition is healthy. Nutrition and aerobic exercise combined will get that 15 lbs. away for you, but everyone knows it's not going to happen overnight. You must be patient. Hope I helped. :)

Biking is not an effective cardio workout, nor does it tone lean muscle, except in the legs somewhat. I would reccommend running or using an elliptical for half that time. That will burn more calories an tone muscle. Muscle burns fat, plus you don't want flappy skin. Also, it would be better to alternate, one day cardio one day crunches. Doing both on the same day will overwork your body and you will be only able to study it for a short time. Also try to add in pushups to your workout as well, on days you do crunches.


STUDY ISLAM...ITS THE TRUTH!

you should jog around the neighbor hood that should work do it every day well
good luck best answer Plz

Here's what I've found the works for losing weight. First of all, no way to know how long it will take you to lose 15 lbs b/c everyone's metabolism is different....but here's what to do for the best results.
1) Do not drink alcohol = empty calories, so the body can't use them effectively
2) If you eat bread, only eat whole wheat
3) Exercise in the morning if possible. It will turn on your fat-burning metabolism early and make it run all day.
4) Only drink water, don't drink your calories. Water will clean out your system, and assist your metabolic system in burning calories.
5) Eat 5 to 7 small meals a day. You have to eat to burn calories, and that's what you want is a calorie deficit.
6) Eat lean protein for breakfast before working out. It will turn your metabolic engine on. and burn stored energy (fat) and not the carb you just ate, if you were to eat carbs for breakfast
7) Don't eat after 8:00 at night. You system slows down, and will naturally store what it can for reserve....that's hope people get fat.
8) Cardio for 30min/day, 3 days a week
9) Weight training - right weights, more reps, and break your body into regions, legs on day, back and shoulders on day, and chest, biceps, and triceps, one day.
10) Have fun with it, enjoy the weight loss, it will come,....but don't lose too much,... you don't want to look like a Nicole Richie.
Good Luck

Do these things, and I guarantee you'll lose weight. Remember, slow and steady is the way to look at it. Thing is, you're only 130, you're not big...do these things, and you'll have the body you desire.