Weight loss after a ride

Joseph said:

Hello All
I sometimes weigh myself (using electronic scales) before and after a 2 hour
ride I find that I am up to 1 kg lighter at the end. I always have a light
cereal breakfast and my weight is about 65 kg. I realise that I lose water
from my body and also that I wouldn't burn much fat during the ride. I try
and keep hydrated during the ride but is it OK to have a deficit of 1 kg
after the ride?
Joseph

I'm suprised you're losing that much in that short a time period, but as you say it'll just be water going out. I wouldn't sweat it (if you'll pardon the pun), as long as you stay hydrated while out there and drink up when you get back you should be fine. Make sure you eat within an hour of finishing too.

I was quite suprised to find that I had actually *gained* weight (0.3kg) over the course of a 24 hour enduro (4 man team). I'd say it was all the dust caked to my legs but I showered before hand. I can only assume that's because we are eating and drinking plenty between laps.

Joseph said:

Hello All
I sometimes weigh myself (using electronic scales) before and after a 2 hour
ride I find that I am up to 1 kg lighter at the end. I always have a light
cereal breakfast and my weight is about 65 kg. I realise that I lose water
from my body and also that I wouldn't burn much fat during the ride. I try
and keep hydrated during the ride but is it OK to have a deficit of 1 kg
after the ride?

It's quite common to loose a lot of water during a long ride, what
you're describing isn't unusual.

"Bleve" <[email hidden]> wrote in message
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Quoted message said:

Joseph said:

Hello All
I sometimes weigh myself (using electronic scales) before and after a 2
hour
ride I find that I am up to 1 kg lighter at the end. I always have a
light
cereal breakfast and my weight is about 65 kg. I realise that I lose
water
from my body and also that I wouldn't burn much fat during the ride. I
try
and keep hydrated during the ride but is it OK to have a deficit of 1 kg
after the ride?

It's quite common to loose a lot of water during a long ride, what
you're describing isn't unusual.

No, your body is something like 60% water.

Ikg water = 1 litre, so you could try drinking an extra litre the
day/night before and see if that keeps your weight at 65kg. Doesnt seem to
be any harm in losing that much water, maybe even more , so long as you
drink afterward, and its not too hot a day so you might get heat stress
(which *apparently* hasnt that much to do with amount of water in the body).

see http://www.bushwalking.org.au/FAQ/FAQ_Salt.htm for some further
interesting reading/research results. Liked the bit about Lawrence of
Arabia- the desert arabs only drank when their camels drank. Marathoners
didnt drink while running until about 1970 or so and few problems were
noted. More have died since due to low salt from excessive water intake. No
conclusive evidence that current fad of drinking heaps of water does you any
good. (His opinions, not nec.mine).

fb

fb

Fractal said:

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Quoted message said:

Joseph said:

Hello All
I sometimes weigh myself (using electronic scales) before and after a 2
hour
ride I find that I am up to 1 kg lighter at the end. I always have a
light
cereal breakfast and my weight is about 65 kg. I realise that I lose
water
from my body and also that I wouldn't burn much fat during the ride. I
try
and keep hydrated during the ride but is it OK to have a deficit of 1 kg
after the ride?

It's quite common to loose a lot of water during a long ride, what
you're describing isn't unusual.

No, your body is something like 60% water.

This, in context, makes no sense. I stated that it's common for the
body to lose a lot of water during exercise (sweat and exhalation).

SomeGuy said:

I was quite suprised to find that I had actually *gained* weight (0.3kg) over the course of a 24 hour enduro (4 man team). I'd say it was all the dust caked to my legs but I showered before hand. I can only assume that's because we are eating and drinking plenty between laps.

That bloody dust from Redesdale? Still finding traces of it around the house, almost a month later. :p

"Joseph" <[email hidden]> wrote in message
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Quoted message said:

Hello All
I sometimes weigh myself (using electronic scales) before and after a 2
hour
ride I find that I am up to 1 kg lighter at the end. I always have a light
cereal breakfast and my weight is about 65 kg. I realise that I lose water
from my body and also that I wouldn't burn much fat during the ride. I try
and keep hydrated during the ride but is it OK to have a deficit of 1 kg
after the ride?
Joseph

I managed to lose 10 kg's on a 2 day tour race over a distance of 470 km,
some 16 years ago.

I weighed myself friday at work and then on monday at work and I was 10 kg's
lighter.

I won C grade in that event, it was my first long distance 2 day tour I
drank heaps of fluid and I was totally exhausted when I crossed the line
some 20 mins ahead of my nearest competitor.

I put about 5 kg back on during the week after the race after eating all the
food in the house :P

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Quoted message said:

Fractal said:

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Quoted message said:

Joseph wrote:

> Hello All
> I sometimes weigh myself (using electronic scales) before and after a
> 2
> hour
> ride I find that I am up to 1 kg lighter at the end. I always have a
> light
> cereal breakfast and my weight is about 65 kg. I realise that I lose
> water
> from my body and also that I wouldn't burn much fat during the ride. I
> try
> and keep hydrated during the ride but is it OK to have a deficit of 1
> kg
> after the ride?

It's quite common to loose a lot of water during a long ride, what
you're describing isn't unusual.

No, your body is something like 60% water.

This, in context, makes no sense. I stated that it's common for the
body to lose a lot of water during exercise (sweat and exhalation).

I meant Yes, I agree with you. What I was getting at was that if you weigh
65kg you would be about 40kg of water, so 1kg loss wouldnt make much
difference. What is a "lot" in this context? I.E., when do your cells start
working too hard and affecting your brain or other organs?

fbee

I just found an article that adresses my original question. See latest
Australian Cyclist p64.
Thank you for all your comments.
Joseph
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Quoted message said:

Fractal said:

"Bleve" <[email hidden]> wrote in message
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>
> Joseph wrote:
>
>> Hello All
>> I sometimes weigh myself (using electronic scales) before and after

a

Quoted message said:

Quoted message said:

Quoted message said:

>> 2
>> hour
>> ride I find that I am up to 1 kg lighter at the end. I always have a
>> light
>> cereal breakfast and my weight is about 65 kg. I realise that I lose
>> water
>> from my body and also that I wouldn't burn much fat during the ride.

I

Quoted message said:

Quoted message said:

Quoted message said:

>> try
>> and keep hydrated during the ride but is it OK to have a deficit of

1

Quoted message said:

Quoted message said:

Quoted message said:

>> kg
>> after the ride?
>
> It's quite common to loose a lot of water during a long ride, what
> you're describing isn't unusual.
>

No, your body is something like 60% water.

This, in context, makes no sense. I stated that it's common for the
body to lose a lot of water during exercise (sweat and exhalation).

I meant Yes, I agree with you. What I was getting at was that if you

weigh

Quoted message said:

65kg you would be about 40kg of water, so 1kg loss wouldnt make much
difference. What is a "lot" in this context? I.E., when do your cells

start

Quoted message said:

working too hard and affecting your brain or other organs?

fbee

Fractal said:

wrote in message
I meant Yes, I agree with you. What I was getting at was that if you weigh
65kg you would be about 40kg of water, so 1kg loss wouldnt make much
difference. What is a "lot" in this context? I.E., when do your cells start
working too hard and affecting your brain or other organs?

Isn't it around a '2% loss of body weight from dehydration' where performance begins to suffer? So, a 65kg person losing 1kg of fluids is approaching the realm of losing out performance-wise.

hippy
- it's been a long time..

hippy said:

Isn't it around a '2% loss of body weight from dehydration' where
performance begins to suffer? So, a 65kg person losing 1kg of fluids is
approaching the realm of losing out performance-wise.

No idea of the exact figure but it has to be higher. Urine tests come to
mind and if the body can loose the amount of fluid they want, I don't
think it is a problem.

cfsmtb said:

SomeGuy said:

I was quite suprised to find that I had actually *gained* weight
(0.3kg) over the course of a 24 hour enduro (4 man team). I'd say it
was all the dust caked to my legs but I showered before hand. I can
only assume that's because we are eating and drinking plenty between
laps.

That bloody dust from Redesdale? Still finding traces of it around the
house, almost a month later. :p

I recently attended a talk by the head cycling coach of from ACTAS. He
told us about a junior he was coaching that lost 4 kg over a 120k ride
even though they were hydrating during the ride. Some people lose m,ore
water than others obviously.

--
Bean

"I've got a bike
You can ride it if you like
It's got a basket
A bell that rings
And things to make it look good
I'd give it to you if I could
But I borrowed it" Pink Floyd

Remove "yourfinger" before replying

quote='Terryc'hippy said:

Isn't it around a '2% loss of body weight from dehydration' where
performance begins to suffer? So, a 65kg person losing 1kg of fluids is
approaching the realm of losing out performance-wise.

No idea of the exact figure but it has to be higher. Urine tests come to
mind and if the body can loose the amount of fluid they want, I don't
think it is a problem.[/QUOTE]

According to this, 2% loss of body weight is where the trouble starts..

cptips.comfluids.htmOpen ↗

Dehydration is defined as a >1% loss of body weight as a result of fluid loss. Unreplaced water losses equal to 2% of body weight (about 3 pounds for the average rider) impact heat regulation, at 3% there is a measurable decrease in muscle cell contraction times, and when fluid losses reach 4% of body weight, there is a 5 to 10% drop in overall performance which can persist for up to 4 hours after rehydration takes place.

hippy

hippy said:

Terryc said:

hippy said:

Isn't it around a '2% loss of body weight from dehydration' where
performance begins to suffer? So, a 65kg person losing 1kg of fluids

is

Quoted message said:

approaching the realm of losing out performance-wise.

No idea of the exact figure but it has to be higher. Urine tests come
to
mind and if the body can loose the amount of fluid they want, I don't
think it is a problem.

According to this, 2% loss of body weight is where the trouble
starts..

http://www.cptips.com/fluids.htm

Dehydration is defined as a >1% loss of body weight as a result of
fluid loss. Unreplaced water losses equal to 2% of body weight (about 3
pounds for the average rider) impact heat regulation, at 3% there is a
measurable decrease in muscle cell contraction times, and when fluid
losses reach 4% of body weight, there is a 5 to 10% drop in overall
performance which can persist for up to 4 hours after rehydration takes
place.

It's a shame Tam isn't around at the moment, she'd be able to cite some
recent research into this, but from memory, the effects of mild
dehydration aren't nearly as bad as a lot of literature suggests.

quote='Bleve'hippy said:

According to this, 2% loss of body weight is where the trouble
starts..

It's a shame Tam isn't around at the moment, she'd be able to cite some
recent research into this, but from memory, the effects of mild
dehydration aren't nearly as bad as a lot of literature suggests.[/QUOTE]

In _my_ early days, it was usually stated that 1L/hr during strenuous exercise was what you should aim for. I remember reading, more recently, a study that showed you could get away with around half that amount and not suffer a performance hit. This probably applies for one off events and not the TdF though.. ;-) Be damned if I can remember where I saw it.

hippy
CLT: TISM's "Root" cross-fading into "You're a long way from home Pt1" and into MGF. Does iTunes know I'm looking at an Aussie forum now?

Bleve said:

hippy said:

Terryc said:

hippy wrote:

> Isn't it around a '2% loss of body weight from dehydration' where
> performance begins to suffer? So, a 65kg person losing 1kg of fluids
is
> approaching the realm of losing out performance-wise.

No idea of the exact figure but it has to be higher. Urine tests come
to
mind and if the body can loose the amount of fluid they want, I don't
think it is a problem.

According to this, 2% loss of body weight is where the trouble
starts..

http://www.cptips.com/fluids.htm

Dehydration is defined as a >1% loss of body weight as a result of
fluid loss. Unreplaced water losses equal to 2% of body weight (about 3
pounds for the average rider) impact heat regulation, at 3% there is a
measurable decrease in muscle cell contraction times, and when fluid
losses reach 4% of body weight, there is a 5 to 10% drop in overall
performance which can persist for up to 4 hours after rehydration takes
place.

It's a shame Tam isn't around at the moment, she'd be able to cite some
recent research into this, but from memory, the effects of mild
dehydration aren't nearly as bad as a lot of literature suggests.

Someone mention me? 😉

Studies into hyponatraemia determined a correlation between
being the best performers in endurance events and being
mildly dehydrated. They didn't know which was cause and
which was effect, but they hinted that a little bit of
dehydration is probably not a bad thing. Search for
hyponatremia or hyponatraemia.

Tam

SomeGuy said:

Joseph said:

Hello All
I sometimes weigh myself (using electronic scales) before and after a 2
hour
ride I find that I am up to 1 kg lighter at the end. I always have a
light
cereal breakfast and my weight is about 65 kg. I realise that I lose
water
from my body and also that I wouldn't burn much fat during the ride. I
try
and keep hydrated during the ride but is it OK to have a deficit of 1
kg
after the ride?
Joseph

I'm suprised you're losing that much in that short a time period, but
as you say it'll just be water going out. I wouldn't sweat it (if
you'll pardon the pun), as long as you stay hydrated while out there
and drink up when you get back you should be fine. Make sure you eat
within an hour of finishing too.

I was quite suprised to find that I had actually *gained* weight
(0.3kg) over the course of a 24 hour enduro (4 man team). I'd say it
was all the dust caked to my legs but I showered before hand. I can
only assume that's because we are eating and drinking plenty between
laps.

--
SomeGuy

Gaining a little bit of weight isn't a problem, but gaining
over 1kg usually indicates that you're taking on board too
much water (generally accompanied by not enough salt).

T