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Bonking + Bicycles
On 5/26/2020 5:40 PM, AMuzi wrote:
So what is that pathway? In my case, in cool wet weather with sustained effort for a few hours, I just ran out of something (if not everything). I'm curious too. It's certain that I could never ride forever even at my strongest. (I did 200 miles in one day, but once was enough for me.) Some sort of reservoir gets depleted as we exert ourselves, obviously. Eating and drinking helps, but there are still limits. And that's regarding just one long ride. There's also a depressing effect I've discovered as I've aged: It seems harder and harder to train to do long distances. It's like that reservoir that gets depleted during a long ride also gets smaller every year. What exactly is that reservoir? And come to think of it, how does consistent training make it bigger? When a person gets better at long rides by doing lots of long rides, what exactly is changing inside one's body? -- - Frank Krygowski |
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Bonking + Bicycles
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#23
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Bonking + Bicycles
wrote:
On Monday, May 25, 2020 at 6:53:44 PM UTC-7, Duane wrote: Mark Cleary wrote: I have and takes 24 hours of nothing but rest, food and liquids. 1989 Chicago Marathon I ran whole way in 3:23 and it was hot 80 degrees in sun last 8 miles. I sat down at the end and could not get back up. I tried to stand and it all when white buzz. A friend found me and gave me a regular coke to drink. Within minutes got up and got to car drove home. I of course was 30 years younger at the time. To this day I never stop and eat except on century I am pushing for time. I don’t even take water for 50 miles unless hot. I good for 59-70 but can bonk if I am low on fuel. No matter what a 28/34 gear is not easy. Moral is probably fuel sugar coke ok! Deacon Mark Like I said, I Earp gels riding. Maybe a cliff bar in the middle if the rides long enough. Riding for 50 miles with no liquid? That’s probably not a good idea. On an 85km ride I’d do a couple water bottles at least. The period of time that a gel works for me is so short that I simply don't use them. I don’t insist that anyone does what I do. What works for me is to periodically eat a gel and more often drink something, preferably with electrolytes. Everyone is different so YMMV and probably does. ( think I ripped that quote off of M. Muzi) |
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Bonking + Bicycles
wrote:
On Tuesday, May 26, 2020 at 10:24:14 PM UTC+2, wrote: I always laugh and chuckle when people yip and yap about bonking and running out of sugar. Ha Ha. Just people making up nonsense. Unless you are a Type 1 diabetic, or maybe maybe Type 2 also, you cannot get a low blood sugar. The human body does not allow blood sugars to fall very low. The Islets of Langerhans inside the pancreas produce the hormone insulin. This is injected into the blood stream and works with the glucose in the blood to keep the blood sugar at a fairly constant level. No matter how much you exercise and no matter how much or little you eat, the non-diabetic body is excellent at regulating the blood sugar to keep blood sugar at a very constant normal level. Your blood sugar does not go up and down in a non-diabetic. Blood sugar going up and down is similar to a person saying they stopped their heart from beating for a minute or two. Do you believe people can manually control whether their heart beats? If you do then you likely will also believe your blood sugar goes up and down. And what causes the symptoms we call bonking and go away when we eat sugary food. Or does this also not happen? Lou Lou +1 |
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Bonking + Bicycles
On Tue, 26 May 2020 13:24:12 -0700 (PDT), "
wrote: I always laugh and chuckle when people yip and yap about bonking and running out of sugar. Ha Ha. Just people making up nonsense. Unless you are a Type 1 diabetic, or maybe maybe Type 2 also, you cannot get a low blood sugar. The human body does not allow blood sugars to fall very low. The Islets of Langerhans inside the pancreas produce the hormone insulin. This is injected into the blood stream and works with the glucose in the blood to keep the blood sugar at a fairly constant level. No matter how much you exercise and no matter how much or little you eat, the non-diabetic body is excellent at regulating the blood sugar to keep blood sugar at a very constant normal level. Your blood sugar does not go up and down in a non-diabetic. Blood sugar going up and down is similar to a person saying they stopped their heart from beating for a minute or two. Do you believe people can manually control whether their heart beats? If you do then you likely will also believe your blood sugar goes up and down. Errr... your body stores glycogen in the liver and in the muscles. As you exercise glycogen is released into your blood stream as glucose which is basically the fuel source for the muscles. If you exercise at a rate either higher than the body releases glycogen or until a point where the glycogen is essentially depleted then the blood-glucose levels drop. The brain will prioritize itself over anything else because glucose is its primary fuel source. This is refereed to as non-diabetic hypoglycemia or exercise-induced hypoglycemia and known to the laity as "bonking". ( hypoglycemia ~ noun 1. abnormally low blood sugar usually resulting from excessive insulin or a poor diet ) -- cheers, John B. |
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Bonking + Bicycles
On Tue, 26 May 2020 18:28:02 -0400, Frank Krygowski
wrote: On 5/26/2020 5:40 PM, AMuzi wrote: So what is that pathway? In my case, in cool wet weather with sustained effort for a few hours, I just ran out of something (if not everything). I'm curious too. It's certain that I could never ride forever even at my strongest. (I did 200 miles in one day, but once was enough for me.) Some sort of reservoir gets depleted as we exert ourselves, obviously. Eating and drinking helps, but there are still limits. And that's regarding just one long ride. There's also a depressing effect I've discovered as I've aged: It seems harder and harder to train to do long distances. It's like that reservoir that gets depleted during a long ride also gets smaller every year. What exactly is that reservoir? And come to think of it, how does consistent training make it bigger? When a person gets better at long rides by doing lots of long rides, what exactly is changing inside one's body? The reservoir is Glycogen, i.e. glucose, stored in the muscles and the liver. When one rides for long periods one is exercising and thus the muscles are growing stronger. -- cheers, John B. |
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Bonking + Bicycles
On 5/26/2020 7:42 PM, John B. wrote:
On Tue, 26 May 2020 16:40:38 -0500, AMuzi wrote: On 5/26/2020 3:24 PM, wrote: I always laugh and chuckle when people yip and yap about bonking and running out of sugar. Ha Ha. Just people making up nonsense. Unless you are a Type 1 diabetic, or maybe maybe Type 2 also, you cannot get a low blood sugar. The human body does not allow blood sugars to fall very low. The Islets of Langerhans inside the pancreas produce the hormone insulin. This is injected into the blood stream and works with the glucose in the blood to keep the blood sugar at a fairly constant level. No matter how much you exercise and no matter how much or little you eat, the non-diabetic body is excellent at regulating the blood sugar to keep blood sugar at a very constant normal level. Your blood sugar does not go up and down in a non-diabetic. Blood sugar going up and down is similar to a person saying they stopped their heart from beating for a minute or two. Do you believe people can manually control whether their heart beats? If you do then you likely will also believe your bl ood sugar goes up and down. On Saturday, May 23, 2020 at 6:07:52 PM UTC-5, Sir Ridesalot wrote: Have any of you been on a ride where you've bonked to the point that every single pedal stroke no matter how low a gear you're in or how calm the winds are, feels like it's all you can do to get that crankarm past the 12 0'clock position? If so, how long did it take you to recover so that you were able to ride at your normal pace again? If you ate soon after bonking, how long did it take you to then recover enough to ride further? Cheers Good to know. I didn't ascribe a pathway to my once-only-in-a-lifetime-of-riding event. Whatever happened, it was sudden and debilitating, as much physical as mental in that my brain was not working right. So what is that pathway? In my case, in cool wet weather with sustained effort for a few hours, I just ran out of something (if not everything). Marathon runners and (I believe) professional bicycle racers eat large carbnohydrate heavy meals for a period before they expend effort. Yes, that's well known. What I think distinguishes my experience, and from others' comments here, the general pattern for a bonk is excessive metabolic spending, more than what's in the bank as it were. At that time 85 miles at non-competitive speeds would not have been a problem for me; just a ride. Fighting winds while chilled in a wet jersey proved over whatever limit there was. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
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#30
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Bonking + Bicycles
On Tue, 26 May 2020 19:51:34 -0500, AMuzi wrote:
On 5/26/2020 7:42 PM, John B. wrote: On Tue, 26 May 2020 16:40:38 -0500, AMuzi wrote: On 5/26/2020 3:24 PM, wrote: I always laugh and chuckle when people yip and yap about bonking and running out of sugar. Ha Ha. Just people making up nonsense. Unless you are a Type 1 diabetic, or maybe maybe Type 2 also, you cannot get a low blood sugar. The human body does not allow blood sugars to fall very low. The Islets of Langerhans inside the pancreas produce the hormone insulin. This is injected into the blood stream and works with the glucose in the blood to keep the blood sugar at a fairly constant level. No matter how much you exercise and no matter how much or little you eat, the non-diabetic body is excellent at regulating the blood sugar to keep blood sugar at a very constant normal level. Your blood sugar does not go up and down in a non-diabetic. Blood sugar going up and down is similar to a person saying they stopped their heart from beating for a minute or two. Do you believe people can manually control whether their heart beats? If you do then you likely will also believe your bl ood sugar goes up and down. On Saturday, May 23, 2020 at 6:07:52 PM UTC-5, Sir Ridesalot wrote: Have any of you been on a ride where you've bonked to the point that every single pedal stroke no matter how low a gear you're in or how calm the winds are, feels like it's all you can do to get that crankarm past the 12 0'clock position? If so, how long did it take you to recover so that you were able to ride at your normal pace again? If you ate soon after bonking, how long did it take you to then recover enough to ride further? Cheers Good to know. I didn't ascribe a pathway to my once-only-in-a-lifetime-of-riding event. Whatever happened, it was sudden and debilitating, as much physical as mental in that my brain was not working right. So what is that pathway? In my case, in cool wet weather with sustained effort for a few hours, I just ran out of something (if not everything). Marathon runners and (I believe) professional bicycle racers eat large carbnohydrate heavy meals for a period before they expend effort. Yes, that's well known. What I think distinguishes my experience, and from others' comments here, the general pattern for a bonk is excessive metabolic spending, more than what's in the bank as it were. At that time 85 miles at non-competitive speeds would not have been a problem for me; just a ride. Fighting winds while chilled in a wet jersey proved over whatever limit there was. Generally speaking, muscle strength is a major factor. When I broke my hip I was in bed for about 4 weeks. Flat on my back with traction on my leg. When I finally got up I could barely support my own weight. And, horrible as it might be, the normal ageing process results in muscle deterioration and old folks "just can't hack it any more", and, based on the ability to run a 4 minute mile the ageing process appears to start around the age of 40 :-( -- cheers, John B. |
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