The Week That Was
Wednesday: 0.67hr. run (zone 3/zone 4, max. 180)
Friday: 1.75hr. treadmill run (1.0hr. lower half zone 2; 0.75hr. zone 4, max. 175)
Saturday: 1.0hr. treadmill run (lower half zone 2)
Sunday: 2.75hr. treadmill run (zone 2)
Perhaps Sunday's run gave me a rough guide to what proportion of carbs versus fats I was burning in zone 2. Somewhere over 80 minutes into the run I was feeling glycogen depletion effects, also evident in my decreasing heart rate. I took in a 100 calorie gel at 90 minutes, 110 minutes, 130 minutes, and 150 minutes; for the rest of run glycogen depletion felt less pressing, and my heart rate moved back up appropriately. The treadmill claims I was burning 297 calories per 20 minute segment, and it seems I wasn't burning more than the 100 calories of carbs in the gel.
For me to believe that, though, I have to believe having glycogen depletion kicking in before 90 minutes. Friday evening's run was demanding - gotta love the fast finish long run (although I don't do the final kick at 10K pace). My Sunday breakfast was about 400 calories, and I didn't start running until 3 hours after that was done.
Yeah, it's a stretch. Nice to dream though!
Friday: 1.75hr. treadmill run (1.0hr. lower half zone 2; 0.75hr. zone 4, max. 175)
Saturday: 1.0hr. treadmill run (lower half zone 2)
Sunday: 2.75hr. treadmill run (zone 2)
Perhaps Sunday's run gave me a rough guide to what proportion of carbs versus fats I was burning in zone 2. Somewhere over 80 minutes into the run I was feeling glycogen depletion effects, also evident in my decreasing heart rate. I took in a 100 calorie gel at 90 minutes, 110 minutes, 130 minutes, and 150 minutes; for the rest of run glycogen depletion felt less pressing, and my heart rate moved back up appropriately. The treadmill claims I was burning 297 calories per 20 minute segment, and it seems I wasn't burning more than the 100 calories of carbs in the gel.
For me to believe that, though, I have to believe having glycogen depletion kicking in before 90 minutes. Friday evening's run was demanding - gotta love the fast finish long run (although I don't do the final kick at 10K pace). My Sunday breakfast was about 400 calories, and I didn't start running until 3 hours after that was done.
Yeah, it's a stretch. Nice to dream though!
posted by Brent Buckner at 9/28/2009 09:10:00 am
4 Comments:
Very good!
I have to say I'm fascinated by the no eating thing. It makes sense. But then I wonder... Do I want my body to be more efficient at burning fat?
A fine week!
More glycogen depletion training would probably have been useful for me last weekend when I discovered I'd be running sans my normal nutrition. However, my HR stayed high and I suspect lack of nutrition was actually secondary to the heat despite my mind being mostly concerned about the former. Mind boggling!
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