On 3/24/2025 8:35 PM, Mark J cleary wrote:
On 3/24/2025 6:08 PM, zen cycle wrote:
On 3/24/2025 12:15 PM, Mark J cleary wrote:
Now that I have worked with using my Garmin 945 for indoor smart
training option I notice this happen today.
I had done all my non-erg mode riding, that is called free ride on
the Garmin 945, with the incline resistance set to 1. Apparently >>> it equates to 1% incline if riding outside. Notice that the best I
could manage for a 20-30 mile ride was about 14-15 mph. Watts
calculate should be accurate.
This morning I did the free ride and put the resistance to 0 zero so
in effect flat. I manage 17 mph for 28 miles and produced 137 watts
according to metrics. I have a Flux 2 trainer. This compares to
yesterday when I rode in the erg mode and set power at 135. I
finished that ride with 144 watts average and 18.2 mph.
In the free ride the watts produced show less MPH but I realized
training inside it is all about watts. I just found some the data
interesting.
Do you have your weight entered into the system?
Yes I do I weigh 169 in my birthday suit. i think the difference is in
the free mode you have no let up if going over the power setting. In the
erg mode I set it at say 115 but push mostly to around 130 ish and it
then backs off on the upstroke of the pedal since i push a higher watt.
Even in the erg mode I do tempo charges where I got from say 110 to 240
watts and of course the trainer then starts changing the resistance. In
the free mode it is all less program.
Setting the wattage is one thing. "watts is watts", as they say. Wattage
has nothing to do with how much you weigh. The reason I was asking is
because you mentioned adjusting the incline grade. The power required
for me at #145 to go up a 5 % grade at 10 mph is very different (much
less) than the power it would take you to go up a 5% grade at 10 mph.
The difference of course being that you as a larger person have more
muscle mass and can generate more power than me. This is why for
comparison purposes cycling power is often measured in Watts per Kilogram.
Theoretically, two people generating the same W/Kg should do about the
same speed. OF course, there are other factors to consider such as
frontal area vs mass for drag calculations, but if we both generate 3
W/Kg at speeds where drag isn't considerable (like a 5 % grade) we
should be riding at the same speed, with me generating 197 watts and
you generating 230 watts.
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