Originally Posted by daneil
I just got a new (used) Mag trainer and last night was the first night on it. I surprised the hell out of myself by cranking out a 10mile tt in 24min at an average cadence of 105 and heart rate of 140 (my max is 180). Now I don't know where this puts me. I know that on my usual 20-25 mile relatively flat weekend rides I certainly don't average 26 mph. Does this mean that it's in my head that I only average 17-18 mph, or is it all in the aerodynamic drag? I'm just trying to figure out what this all means and how to train effectively to start racing next year. Thanks all. I appreciate the help.
I'm not sure if this will help, but I'm totally obsessed with counting
my miles (i don't know why), so I panicked when it was obvious to
me that the miles on the trainer didn't correspond to those done on
the road. So I synchronized (and calibrated) a Cateye computer with
my heart rate, based on my experience of what HR on the road corresponds
with what speed. For example, I know that 60% max HR corresponds to a speed
of roughly 20 mph, so I went from there.
While obviously not completely accurate, I think it's better than
just leaving it up to a normally calibrated speedo.