Plateauing cycling stamina=less calories burned?

[Dogmama]

Yep, this is a fact. I can't find my personal trainer manual to give you an exact quote--but the body adapts. The heart becomes more efficient, the muscles become more efficient, the lungs become more efficient. Over time it takes less exertion to do the same activity. Therefore, to continue to increase your fitness, you have to change up your workouts (pedal faster, find a more challenging route or increase workout time).

This is true of walking, weight lifting, running or cycling.

I can't find my manual either - but I do remember reading this too. So, maybe mix up the aerobic exercise - do some stair climbing, running, etc. I'm always amazed at how HARD running is when I've been doing mostly cycling.