The Mayo clinic agrees, interval training is the best way to get the most out of your exercise.
Do you do the elliptical for 40 minutes, everyday?
Is the elliptical or the recumbent bike the only exercise you do?
Have you not noticed a difference in your muscle mass? Your body shape?
It is SO important to implement interval training with exercise. If you do the same exercises everyday, for a long time, your body does not respond the way you would like. YOU HAVE TO CHANGE what you are doing daily and in intervals.
Diet and nutrition are the same. If you eat the same thing everyday, at the same time, and do not vary your food, you will NOT lose weight.
Variety is important in life on many different levels! Do you vary your diet and exercise enough?