RR - that's interesting about the long run pace. Does your body learn to burn fat when you run slower because your heart rate remains slightly lower? When I trained for my first marathon I was doing my long runs as quick as I could (a go hard or go home approach). That would explain why I blew up at mile 20 on the big day! Thanks for the info. Slow and steady wins (finishes) the race.
RR. Thanks. I am not a medic so I appreciate the simplification. On that basis, should I not bother with gels for my long runs? So far I haven't but I am starting this month 20+ for my long runs and wonder whether I should take a gel with me.
Denis - it's a balancing act. The idea of long runs is to train your system to cope with less glycogen (quick energy) and become more efficient at using fat stores (slow energy) to provide ATP (ultra-fast energy) directly into the muscle mitochondria.
Soooo... if you put less sugars into your body on a long run (gels are sugars), then your body has to rely more on fat (everyone has plenty of this). BUT, it may be that the lack of glycogen is so severe that people give up and don't complete their long runs, which is worse than if you took a gel and carried on.
Knowing that you are a very experienced and capable runner (don't do the following if you can't describe yourself this way), is to occasionally on a long run, not load up with food/ fuel beforehand. So start with a relatively low supply of glycogen. Then go out for your long run at slow speed, making sure you stay in areas where people are nearby (in case anything horrible happens to your body). You will run out of glycogen much earlier and really stress your fat-energy system.
This is really painful, can lead to dizziness and nausea (feeling sick) and takes a long time to recover. It is a bit extreme. I'd also take a long one or two gels for emergency supplies if you find your body really doesn't cope. For some people, they find this helps. I've only done it twice and hated it both times. But it probably made me stronger.
Mausey _ I hope that you feel very welcome and at home here in the Northern Hemisphere. Hope we get to see you more often.