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Bonking after 20 miles?
In article ,
"Zen Cohen" writes: Rode into the wind for 15 miles w/ about 16.5 mph pace. About 5 miles into the return trip I felt very fatigued. My usual heartrate is around 155 bpm and was having trouble sustaining a pace that would keep me at 135. I ate a granola bar and felt a little better but not much. I had a meal of about 800 calories two hrs before the ride but have been on a significantly reduced-cal diet the last few weeks. I've never bonked this early into a ride, but that's what it felt like. Is it possible to bonk after this short a ride and having eaten a full meal a couple hrs before? If so, is it possible that the low-calorie diet left my glycogen stores too low for this short a ride? Thanks for any comments. Bonking is an extreme condition, like fainting. You just ran out of gas -- that's no good, either. But I bet a can o' Coca-Cola woulda fixed ya up in no time. It really takes a vast amount of work & deprivation to truly bonk. Next time, pack along some Scots pies and/or date-nut squares. Or chocolate fudge brownies. Or cowboy cookies. Or those li'l sachets of sugar you get from Starbucks to put into your take-away coffee -- just pour 'em into your water bottle. A lot of folks like fig newtons, 'cuz they don't crumble and fall onto the road before you can get a mouthful. My own homemade date-nut loaf is like rocket fuel for cyclists. I make two kinds, depending on where your mind is. cheers, Tom -- Nothing is safe from me. I'm really at: tkeats curlicue vcn dot bc dot ca |
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#2
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Bonking after 20 miles?
Rode into the wind for 15 miles w/ about 16.5 mph pace. About 5 miles into
the return trip I felt very fatigued. My usual heartrate is around 155 bpm and was having trouble sustaining a pace that would keep me at 135. I ate a granola bar and felt a little better but not much. I had a meal of about 800 calories two hrs before the ride but have been on a significantly reduced-cal diet the last few weeks. I've never bonked this early into a ride, but that's what it felt like. Is it possible to bonk after this short a ride and having eaten a full meal a couple hrs before? If so, is it possible that the low-calorie diet left my glycogen stores too low for this short a ride? Thanks for any comments. |
#3
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Bonking after 20 miles?
Zen Cohen wrote:
Rode into the wind for 15 miles w/ about 16.5 mph pace. About 5 miles into the return trip I felt very fatigued. My usual heartrate is around 155 bpm and was having trouble sustaining a pace that would keep me at 135. I ate a granola bar and felt a little better but not much. I had a meal of about 800 calories two hrs before the ride but have been on a significantly reduced-cal diet the last few weeks. I've never bonked this early into a ride, but that's what it felt like. Is it possible to bonk after this short a ride and having eaten a full meal a couple hrs before? Apparently, yes. If so, is it possible that the low-calorie diet left my glycogen stores too low for this short a ride? Thanks for any comments. Wind blows. Err, sucks. Umm, you used up a lot of energy fighting Mother Nature. |
#4
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Bonking after 20 miles?
Zen Cohen wrote:
:: Rode into the wind for 15 miles w/ about 16.5 mph pace. About 5 :: miles into the return trip I felt very fatigued. My usual heartrate :: is around 155 bpm and was having trouble sustaining a pace that :: would keep me at 135. I ate a granola bar and felt a little better :: but not much. I had a meal of about 800 calories two hrs before the :: ride but have been on a significantly reduced-cal diet the last few :: weeks. :: :: I've never bonked this early into a ride, but that's what it felt :: like. Is it possible to bonk after this short a ride and having :: eaten a full meal a couple hrs before? If so, is it possible that :: the low-calorie diet left my glycogen stores too low for this short :: a ride? Thanks for any comments. Yes, especially since you had been doing a "signficiantly reduced-cal diet" for the previous few weeks. Your body can store roughly 2000 kcals of glycogen...in your muscles and liver....and since you were undereating prior, you were depleted before the day started. That 800 cal meal didn't replenish you completely and than you started riding...fairly hard because of the wind. The 800 probably wasn't all carbs, either So yes, you can bonk even if you eat...it depends on what you eat and what kind of exercise you're doing. Without the wind, it might have been different. |
#5
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Bonking after 20 miles?
On Jul 2, 12:29 pm, "Roger Zoul" wrote:
Zen Cohen wrote: :: Rode into the wind for 15 miles w/ about 16.5 mph pace. About 5 :: miles into the return trip I felt very fatigued. My usual heartrate :: is around 155 bpm and was having trouble sustaining a pace that :: would keep me at 135. I ate a granola bar and felt a little better :: but not much. I had a meal of about 800 calories two hrs before the :: ride but have been on a significantly reduced-cal diet the last few :: weeks. :: :: I've never bonked this early into a ride, but that's what it felt :: like. Is it possible to bonk after this short a ride and having :: eaten a full meal a couple hrs before? If so, is it possible that :: the low-calorie diet left my glycogen stores too low for this short :: a ride? Thanks for any comments. Yes, especially since you had been doing a "signficiantly reduced-cal diet" for the previous few weeks. Your body can store roughly 2000 kcals of glycogen...in your muscles and liver....and since you were undereating prior, you were depleted before the day started. That 800 cal meal didn't replenish you completely and than you started riding...fairly hard because of the wind. The 800 probably wasn't all carbs, either So yes, you can bonk even if you eat...it depends on what you eat and what kind of exercise you're doing. Without the wind, it might have been different. What he said! Joseph |
#6
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Bonking after 20 miles?
Zen Cohen wrote:
Rode into the wind for 15 miles w/ about 16.5 mph pace. About 5 miles into the return trip I felt very fatigued. My usual heartrate is around 155 bpm and was having trouble sustaining a pace that would keep me at 135. I ate a granola bar and felt a little better but not much. I had a meal of about 800 calories two hrs before the ride but have been on a significantly reduced-cal diet the last few weeks. I've never bonked this early into a ride, but that's what it felt like. Is it possible to bonk after this short a ride and having eaten a full meal a couple hrs before? If so, is it possible that the low-calorie diet left my glycogen stores too low for this short a ride? Thanks for any comments. I doubt it, I think you just had an off day. |
#7
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Bonking after 20 miles?
"Zen Cohen" wrote in message
... Is it possible to bonk Was it a hot day? One time I thought I bonked, but in retrospect, it was probably heat exhaustion. -- Warm Regards, Claire Petersky http://www.bicyclemeditations.org/ See the books I've set free at: http://bookcrossing.com/referral/Cpetersky |
#8
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Bonking after 20 miles?
On Jul 2, 2:04 pm, "Zen Cohen" wrote:
Rode into the wind for 15 miles w/ about 16.5 mph pace. About 5 miles into the return trip I felt very fatigued. My usual heartrate is around 155 bpm and was having trouble sustaining a pace that would keep me at 135. I ate a granola bar and felt a little better but not much. I had a meal of about 800 calories two hrs before the ride but have been on a significantly reduced-cal diet the last few weeks. I've never bonked this early into a ride, but that's what it felt like. Is it possible to bonk after this short a ride and having eaten a full meal a couple hrs before? If so, is it possible that the low-calorie diet left my glycogen stores too low for this short a ride? Thanks for any comments. For me bonking means you are about to fall off the bike due to exhaustion and you're only still upright because of share will power and the need to get something to eat "NOW!" By your description I'd say maybe you haven't been eating properly lately and this has impacted your performance but I wouldn't call it bonking. |
#9
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Bonking after 20 miles?
On Jul 2, 12:04 am, "Zen Cohen" wrote:
Rode into the wind for 15 miles w/ about 16.5 mph pace. About 5 miles into the return trip I felt very fatigued. My usual heartrate is around 155 bpm and was having trouble sustaining a pace that would keep me at 135. I ate a granola bar and felt a little better but not much. I had a meal of about 800 calories two hrs before the ride but have been on a significantly reduced-cal diet the last few weeks. I've never bonked this early into a ride, but that's what it felt like. Is it possible to bonk after this short a ride and having eaten a full meal a couple hrs before? If so, is it possible that the low-calorie diet left my glycogen stores too low for this short a ride? Thanks for any comments. How low is "significantly reduced-cal"? If it's only about 500kCal/ day below your normal (e.g., 1500kCal/day vs. 2000kCal/day), and if you're increasing your caloric intake when you need to account for exercise (roughly 600kCal/hr. @ 16mph), then I don't think it should impact your performance too much. More than that, though, and I might expect some weakness. How much riding have you been doing? It could make a difference if this was your first ride in a few days or if you'd been riding at the same intensity 3-4 days in a row. Also, how was your hydration? I find that I drink about 30-50% more on warm summer days than I do for a comparable ride in the winter. It's easy to overlook. -JR |
#10
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"Bonk" chart from Garmin GPS (was Bonking after 20 miles?)
Thanks for the helpful responses. Has anyone tried Garmin's GPS bike
computers? I got one for Father's Day and the info it yields is pretty amazing. I uploaded the data from my "bonk" ride yesterday to motionbased.com and can see where I started losing stamina around mile 19. If you're interested, go here http://trail.motionbased.com/trail/activity/3192511 and click on 'speed,' then click on the chart. Beginning around mile 15 I was pretty much going with the wind. Dunno how interesting my info is to y'all but the computer is cool. I think I'm going to get one with the integrated HRM. I luv gadgets! "Zen Cohen" wrote in message ... Rode into the wind for 15 miles w/ about 16.5 mph pace. About 5 miles into the return trip I felt very fatigued. My usual heartrate is around 155 bpm and was having trouble sustaining a pace that would keep me at 135. I ate a granola bar and felt a little better but not much. I had a meal of about 800 calories two hrs before the ride but have been on a significantly reduced-cal diet the last few weeks. I've never bonked this early into a ride, but that's what it felt like. Is it possible to bonk after this short a ride and having eaten a full meal a couple hrs before? If so, is it possible that the low-calorie diet left my glycogen stores too low for this short a ride? Thanks for any comments. |
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