How many miles a week should I ride my bike for adequate exercise?

I am trying to lose weight, and I would really like to know if anyone has a good answer to this. Over the last 2 weeks, I have ridden my bike 66.5 miles. Is that good, too much, or not enough?

i think you can do more. but how many times do you ride per week? as a reference point they say entry level marathon trainers should run 20-40 miles per week. on a bike, you should be able to do 4x that. so that's like 80 - 160 miles a week on a bike.

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It's not the miles, it's the time and difficulty.
You need at least 20 minutes a day of cardiovascular exercise(exercise that makes your heart race).
If you can do more than that, great!
That's excellent!!! No such thing as too much bike riding if you have the time. Don't get obsessed with anything to the point it messes up other areas of your life. Balance is the key to everything.

Your body will reward you for every mile. Great to hear when someone finds a way to exercise they enjoy!!!

The "not enough" answers are amusing... It's better for you and burns off more calories than watching TV!!!... You feel stronger the more you ride, right??? "Not enough" to be a pro athelete maybe??? Maybe that's not your goal. These people will die too!!! It's all about balance, priorities and choice.

If you eat a little more carefully and exercise more than you have in the past... You'll lose weight and be healthier. You certainly don't have to ride 10 miles a day to gain health benefits from cycling!!! I used to ride a couple miles a day out of necessity and it absolutely helped keep me in shape and burned off some calories. Cycling burns calories and tones muscles. Toned muscles consume more calories.
This is definately not enough. I run almost that much in 2 weeks. You need to increase the distance. You might want to also increase the pace. You bike should have a speedometer. On a flat surface you should be running near 15 mph or above with a moutain bike and much faster with a road bike. Of course this is just a rough estimate. If you find it too hard, do slow down. Don't hurt yourself. 10 miles per day would be a good start.
you would do better with a healthy diet free of carbs & excessive fat consumption. if you have a sweet tooth go for sugar substitutes & there are no fat substitutes(forget it)

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