Quote Originally Posted by salsabike View Post
I think if you spin faster on the trainer, you will see your heart rate go much higher. A cadence of 76 isn't likely to do that, but 95 or 100 probably would. Easier gears, faster spnning.
Actually that average cadence of 76 is about the same I have on the road. I even never go up to nearly 40 km/hr (25 ml/hr) on a flat road (partially because I need to mind the traffic). Therefore, I was surprised to see my HR wasn't as high as riding outdoors.

I also notice one thing: My upper body was more relaxed when riding on a trainer. It's like only my feet were doing the workout. Would it be the reason for having a lower HR?