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08-01-2004, 04:12 AM
| #11 (permalink) |
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Posts: n/a
| Re: Take your water with a pinch of salt Advise should be taken with a pinch of salt too. The crap about which you complain is due to 'marketing' having to convince us that we must buy their useless product. Water and a good diet will do for me. Expense can be extreme as well as cycling. The conspiracy of ignorance masquerades as common sense. "Doug Evans" <[Only registered and activated users can see links. ]> wrote in message news:b613ab9d.0408010300.5deba885@posting.google.c om... | I've been reading this group for about a week, now, and I feel I must | post to point out that some advice being dished out here is complete | and utter nonsense. | | In various threads I've seen people state that you should drink x | litres of water per hour (or x/3 litres per 20 minutes, or whatever). | | |
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08-01-2004, 06:16 AM
| #17 (permalink) |
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Posts: n/a
| Re: Take your water with a pinch of salt "Doug Evans" <[Only registered and activated users can see links. ]> wrote in message news:b613ab9d.0408010300.5deba885@posting.google.c om... > I've been reading this group for about a week, now, and I feel I must > post to point out that some advice being dished out here is complete > and utter nonsense. > > In various threads I've seen people state that you should drink x > litres of water per hour (or x/3 litres per 20 minutes, or whatever). > > Now, just think about this for a moment. Someone is advising everyone > who reads this ng, that they require a certain rate of liquid intake > to maintain correct hydration. > > Does that seem to make any sort of sense? If it does, think about it a > little more. > > Q: Why does one need to keep drinking water on a ride? > A: To replace water lost by perspiration. (We also lose a little > because exhaled breath is wetter than inhaled). > > Q: Why do we perspire? > A: To cool down. > > Q: What factors affect the amount we need to perspire in order to > remain at an acceptable temperature? > A1: Body size > A2: Velocity > A3: Ambient temperature > A4: Ambient humidity > A5: Clothing > A6: Wind > A7: Weight of cycle > A8: Efficiencly of cycle > A9: Expertise of rider > > > All of these things will affect how much sweat we need to produce. > > The difference in fluid intake requirements between: > > a) A 45 kg woman cycling expertly at 10mph in cool non humid > conditions with just enough clothing to keep warm on an efficient, > lightweight cycle, > > and > > b) A 120kg man cycling inexpertly at 20 mph in hot humid conditions, > wearing more clothing than necessary a poorly maintained heavy cycle. > > Will certainly exceed a factor of 10 (much more likely to be nearer > 30). > > Hydration *is* important, and should certainly not be taken lightly, > and it is true to say, that, within reason, too much is better than > too little. > > Having said that, if you see a recommendation, *any* recommendation, > that specifies a certain rate of consumption without any > qualifications based on the factors mentioned above, *please* do not > take it seriously. Even being as charitable as possible, one cannot > say other than that the person making the recommendation hasn't a clue > what they are talking about (although of course, the figure given may > be spot on for themself, and the conditions under which *they* cycle). > Even to give a figure (3 litres per hour is often quoted), and say > it's a "base", is really nonsensical given the actual possible range > of "correct" values. > > I don't know if anyone has produced a set of charts based on body > weight v speed v ambient temperature (which should be good enough for > a starting point). If not, the best way to check is to observe the > colour of your urine at the end of a ride. If it is noticably yellow, > then you should drink a little more water as you go. If it is orange, > you are drinking far too little. Remember that it is very easy to > become dehydrated before you feel thirsty, but don't force yourself to > drink amounts of water that make you feel uncomfortable. You need a ride!! You have way too much time on your hands |
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08-01-2004, 06:16 AM
| #18 (permalink) |
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Posts: n/a
| Re: Take your water with a pinch of salt "Doug Evans" <[Only registered and activated users can see links. ]> wrote in message news:b613ab9d.0408010300.5deba885@posting.google.c om... > I've been reading this group for about a week, now, and I feel I must > post to point out that some advice being dished out here is complete > and utter nonsense. > > In various threads I've seen people state that you should drink x > litres of water per hour (or x/3 litres per 20 minutes, or whatever). > > Now, just think about this for a moment. Someone is advising everyone > who reads this ng, that they require a certain rate of liquid intake > to maintain correct hydration. > > Does that seem to make any sort of sense? If it does, think about it a > little more. > > Q: Why does one need to keep drinking water on a ride? > A: To replace water lost by perspiration. (We also lose a little > because exhaled breath is wetter than inhaled). > > Q: Why do we perspire? > A: To cool down. > > Q: What factors affect the amount we need to perspire in order to > remain at an acceptable temperature? > A1: Body size > A2: Velocity > A3: Ambient temperature > A4: Ambient humidity > A5: Clothing > A6: Wind > A7: Weight of cycle > A8: Efficiencly of cycle > A9: Expertise of rider > > > All of these things will affect how much sweat we need to produce. > > The difference in fluid intake requirements between: > > a) A 45 kg woman cycling expertly at 10mph in cool non humid > conditions with just enough clothing to keep warm on an efficient, > lightweight cycle, > > and > > b) A 120kg man cycling inexpertly at 20 mph in hot humid conditions, > wearing more clothing than necessary a poorly maintained heavy cycle. > > Will certainly exceed a factor of 10 (much more likely to be nearer > 30). > > Hydration *is* important, and should certainly not be taken lightly, > and it is true to say, that, within reason, too much is better than > too little. > > Having said that, if you see a recommendation, *any* recommendation, > that specifies a certain rate of consumption without any > qualifications based on the factors mentioned above, *please* do not > take it seriously. Even being as charitable as possible, one cannot > say other than that the person making the recommendation hasn't a clue > what they are talking about (although of course, the figure given may > be spot on for themself, and the conditions under which *they* cycle). > Even to give a figure (3 litres per hour is often quoted), and say > it's a "base", is really nonsensical given the actual possible range > of "correct" values. > > I don't know if anyone has produced a set of charts based on body > weight v speed v ambient temperature (which should be good enough for > a starting point). If not, the best way to check is to observe the > colour of your urine at the end of a ride. If it is noticably yellow, > then you should drink a little more water as you go. If it is orange, > you are drinking far too little. Remember that it is very easy to > become dehydrated before you feel thirsty, but don't force yourself to > drink amounts of water that make you feel uncomfortable. You need a ride!! You have way too much time on your hands |
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08-01-2004, 06:16 AM
| #19 (permalink) |
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Posts: n/a
| Re: Take your water with a pinch of salt "Doug Evans" <[Only registered and activated users can see links. ]> wrote in message news:b613ab9d.0408010300.5deba885@posting.google.c om... > I've been reading this group for about a week, now, and I feel I must > post to point out that some advice being dished out here is complete > and utter nonsense. > > In various threads I've seen people state that you should drink x > litres of water per hour (or x/3 litres per 20 minutes, or whatever). > > Now, just think about this for a moment. Someone is advising everyone > who reads this ng, that they require a certain rate of liquid intake > to maintain correct hydration. > > Does that seem to make any sort of sense? If it does, think about it a > little more. > > Q: Why does one need to keep drinking water on a ride? > A: To replace water lost by perspiration. (We also lose a little > because exhaled breath is wetter than inhaled). > > Q: Why do we perspire? > A: To cool down. > > Q: What factors affect the amount we need to perspire in order to > remain at an acceptable temperature? > A1: Body size > A2: Velocity > A3: Ambient temperature > A4: Ambient humidity > A5: Clothing > A6: Wind > A7: Weight of cycle > A8: Efficiencly of cycle > A9: Expertise of rider > > > All of these things will affect how much sweat we need to produce. > > The difference in fluid intake requirements between: > > a) A 45 kg woman cycling expertly at 10mph in cool non humid > conditions with just enough clothing to keep warm on an efficient, > lightweight cycle, > > and > > b) A 120kg man cycling inexpertly at 20 mph in hot humid conditions, > wearing more clothing than necessary a poorly maintained heavy cycle. > > Will certainly exceed a factor of 10 (much more likely to be nearer > 30). > > Hydration *is* important, and should certainly not be taken lightly, > and it is true to say, that, within reason, too much is better than > too little. > > Having said that, if you see a recommendation, *any* recommendation, > that specifies a certain rate of consumption without any > qualifications based on the factors mentioned above, *please* do not > take it seriously. Even being as charitable as possible, one cannot > say other than that the person making the recommendation hasn't a clue > what they are talking about (although of course, the figure given may > be spot on for themself, and the conditions under which *they* cycle). > Even to give a figure (3 litres per hour is often quoted), and say > it's a "base", is really nonsensical given the actual possible range > of "correct" values. > > I don't know if anyone has produced a set of charts based on body > weight v speed v ambient temperature (which should be good enough for > a starting point). If not, the best way to check is to observe the > colour of your urine at the end of a ride. If it is noticably yellow, > then you should drink a little more water as you go. If it is orange, > you are drinking far too little. Remember that it is very easy to > become dehydrated before you feel thirsty, but don't force yourself to > drink amounts of water that make you feel uncomfortable. You need a ride!! You have way too much time on your hands |
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08-01-2004, 06:16 AM
| #20 (permalink) |
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Posts: n/a
| Re: Take your water with a pinch of salt "Doug Evans" <[Only registered and activated users can see links. ]> wrote in message news:b613ab9d.0408010300.5deba885@posting.google.c om... > I've been reading this group for about a week, now, and I feel I must > post to point out that some advice being dished out here is complete > and utter nonsense. > > In various threads I've seen people state that you should drink x > litres of water per hour (or x/3 litres per 20 minutes, or whatever). > > Now, just think about this for a moment. Someone is advising everyone > who reads this ng, that they require a certain rate of liquid intake > to maintain correct hydration. > > Does that seem to make any sort of sense? If it does, think about it a > little more. > > Q: Why does one need to keep drinking water on a ride? > A: To replace water lost by perspiration. (We also lose a little > because exhaled breath is wetter than inhaled). > > Q: Why do we perspire? > A: To cool down. > > Q: What factors affect the amount we need to perspire in order to > remain at an acceptable temperature? > A1: Body size > A2: Velocity > A3: Ambient temperature > A4: Ambient humidity > A5: Clothing > A6: Wind > A7: Weight of cycle > A8: Efficiencly of cycle > A9: Expertise of rider > > > All of these things will affect how much sweat we need to produce. > > The difference in fluid intake requirements between: > > a) A 45 kg woman cycling expertly at 10mph in cool non humid > conditions with just enough clothing to keep warm on an efficient, > lightweight cycle, > > and > > b) A 120kg man cycling inexpertly at 20 mph in hot humid conditions, > wearing more clothing than necessary a poorly maintained heavy cycle. > > Will certainly exceed a factor of 10 (much more likely to be nearer > 30). > > Hydration *is* important, and should certainly not be taken lightly, > and it is true to say, that, within reason, too much is better than > too little. > > Having said that, if you see a recommendation, *any* recommendation, > that specifies a certain rate of consumption without any > qualifications based on the factors mentioned above, *please* do not > take it seriously. Even being as charitable as possible, one cannot > say other than that the person making the recommendation hasn't a clue > what they are talking about (although of course, the figure given may > be spot on for themself, and the conditions under which *they* cycle). > Even to give a figure (3 litres per hour is often quoted), and say > it's a "base", is really nonsensical given the actual possible range > of "correct" values. > > I don't know if anyone has produced a set of charts based on body > weight v speed v ambient temperature (which should be good enough for > a starting point). If not, the best way to check is to observe the > colour of your urine at the end of a ride. If it is noticably yellow, > then you should drink a little more water as you go. If it is orange, > you are drinking far too little. Remember that it is very easy to > become dehydrated before you feel thirsty, but don't force yourself to > drink amounts of water that make you feel uncomfortable. You need a ride!! You have way too much time on your hands |
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