Re: stationary bike
I too am using a stationary bike for my weight loss,and I find what I focus on more, and has been most successful, has been my heart rate and distance. I am a beginning biker, and so I like to maintain a heart rate above 130, and go for fifteen miles, which often comes out to around an hour and a half (with the first mile of warm up and last two miles of cool down, aka slower speeds). Once I get used to a certain distance, and it starts being too easy, or going by too quickly, I up the distance. This has allowed me to lose about 1.5 pounds a week, which is a success, for me.
Hope that this helps!