Exercise Bike

Hi
I am going to start and do a bit of exercising but wanting exercises for my bottom half especially my hips and thighs
Do you know if a exercise bike would do these areas and tone them up as i lose weight as you end up with lose flabby skin.
How long would it take before you see the results of hips thigs toning up

Thanks

Walking is great, not sure about bikes hun

Thanks
I know walking is good for you