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Originally Posted by daveryanwyoming As someone else pointed out you've really got to consider overall calories per day, not the specific breakdown of energy sources during your workouts. |
At some point two years ago or so, someone asked the panel on Cycling News
Form and Fitness page similar questions. Pam Hinton said not to worry about the composition too much (within reason) because your body will find a way to get the mix that it needs, be it fat, glycogen, protein, etc. Just run a reasonable caloric deficit with a good mix of nutrients and it should sort itself out. (I can't find the specific page right now.) That alone suggests to me to burn as many calories/kJ as you can, in whatever way you find palatable, rather than chumming away in L1 for hours because you are using less glycogen there.
Another way of looking at this is that
true weight loss happens over time - weeks and months and years - not over the course of a day. (When you lose measurable weight over the course of a single long ride, it's primarily from water and glycogen loss and not so much fat.) If it were fat that we were losing on those long rides, I think our approach to this stuff would be somewhat different. Instead of replacing our water losses, we'd be replacing our
fat losses (with an appropriate deficit, of course).