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different heartrates on trainer vs road(6 posts)

different heartrates on trainer vs roadDougSloan
Jun 18, 2003 10:28 AM
On the road, my LT appears to be around 165, and I ride a 10 mile time trial around 170. My max, about 2 years ago, was 187. I can climb all day long around 155.

On the Computrainer, I'm dying by 160. I have to sprint to hit 170, and averaging in the low 150s is pretty tough. I have it set up with 3 fans on me, and have enough cooling that I barely drip at all even when climbing hard.

I use a similar cadence on both, and the same bikes.

The CT uses a Polar transmitter and sensor, similar to a bike worn unit.

I don't understand the difference. It really messes with my analysis of training. Could there be one LT for the road and another for the trainer? Seems goofy. Any ideas? Thanks.

Doug
When you are on the trainer, all you have is the pain.MR_GRUMPY
Jun 18, 2003 5:08 PM
When you are on the road, you hurt just as much. You just don't notice it as because there are other things going on around you.
I notice differences...biknben
Jun 18, 2003 6:37 PM
I have a relatively old mag trainer. I really have to concentrate on spinning circles or my stroke gets really choppy. I find myself pulling harder than usual on the up stroke while the other foot is pushing down. In my case, I believe this leads to a higher HR and perceived exertion.

Another thing worth considering is the elevation of the front wheel. I often run the front higher than the rear (maybe two inches). It dawned on me that this changed my STA and put my cranks way out front. I couldn't get my cadence anywhere near what it would be outside on the road.

In the end, I think what you have done is prove that a trainer does not replicate the real thing as much as the marketing dept. would lead us to believe.
I experience the same Dougnoveread
Jun 19, 2003 7:10 AM
I have the same issues Doug. Biknben is the first I've heard of higher HR on the trainer.

I have only two thoughts, the first, is that we just tend to push ourselves harder outside than on a boring trainer. This is possible, but I am not fully convinced this is the case.

The second, which really has come to me after talking to some folks training for the ironman. For example, their LTs are different for each discipline. The causes of these differences is body orientation (swimming) and muscle use (running). So why can't this happen also between open road riding and trainer riding? On the road, we have to worry about much more than just turning the pedals over. We have to ride our line, miss obstacles, change direction, and most importantly, control the bike with our upper body. These are all things we do NOT have to deal with on the trainer as the trainer does it for us. Perhaps it is due to this difference in energy requirements that leads to different HRs between open road riding and trainer riding?

Just a theory, no proof, but maybe this is the cause?

Noveread
I've been wrestling with this too . . .soup
Jun 19, 2003 7:35 AM
I'm 36 and have seen 196 bpm at the Tuesday night training race. I hover between 175-180 on my 13-14 minute climb I use for hill repeats. However, like you, it is all I can do to hold 170 for 6 minutes while doing intervals on the trainer.

I have found that sprinting quickly up to the target HR and then settling into the desired cadence/gear/HR seems make it easier for me to hold a higher HR on the trainer. The long slow grind up to the target HR is a killer.

Bo
re: different heartrates on trainer vs roadVeloflash
Jun 20, 2003 10:39 AM
The stress hormone adrenalin increases heart rate. (Caffeine also increases heart rate).

I find race heart rates higher than training (through adrenalin).

I find training road rates higher than indoor trainer rates.

Could there be an adrenalin connection between the great outdoors and the comfort confines of your home? Maybe a quadruple shot espresso .......