Which exercise machine is more effective, treadmill or elliptical?!

Both. Depending on your reason for exercise either will provide the beneficial effect of exercise. Your exercise prescription for cardiovascular health, if that is the reason for exercise, is calculated by giving you the maximum heart rate for specified time. So the type of exercise it takes to get the maximum heart rate is the only criteria. So both machines can do it.

Related Questions

I want to lose a wieght so which is a best exercise machine to buy at home workout treadmill cycle or elliptical plz tell thanx?

The best exercises. and related equipment are the ones we are most likely t use. My personal choice is a treadmill because you can adjust the speed, listen to ipod, etc.easily while exercising. Peace and good health. Read more...
Elliptical. may provide more muscle building than the treadmill. Muscle helps burn fat. However it is the consistency and healthy diet that matters most. Use of either for 45 minutes or more 5 days a week with a healthy diet will result in healthy weight loss. Read more...
The one you will use. and enjoy doing is the best one. Each person has their own preference. Read more...