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water weight

Joe Virtanen · · Charlotte, NC · Joined May 2010 · Points: 241
highaltitudeflatulentexpulsion wrote: Also Jon, water weighs 2.4lbs per liter. It's easy to get 2L low in a day. Boom, 5lbs.
I might be nitpicking a little, but it's about 2.2lbs/liter.

1L of water = 1kg = 2.20462lbs
highaltitudeflatulentexpulsion · · Colorado · Joined Oct 2012 · Points: 35
Joe Virtanen wrote: I might be nitpicking a little, but it's about 2.2lbs/liter. 1L of water = 1kg = 2.20462lbs
I get my 2.2's and 2.4's confused. So a pound of water is 24 centimeters long, right?
kenr · · Unknown Hometown · Joined Oct 2010 · Points: 16,608
simplyput wrote:Coffee is not hydrating. Nor is caffeinated tea. Both are diarretics and will cause your body to purge all other liquids.
Well I drink lots of caffeinated tea and coffee all the time, and I'm still way over-hydrated most of the time.

I took a real diuretic drug: The effects on my body weight (and urination) were completely different from coffee or tea.

Anyway the scientific results for the non-diuretic properties of tea and coffee have been reported for several years.

Ken
Matt Wilson · · Vermont, USA · Joined May 2010 · Points: 316
highaltitudeflatulentexpulsion wrote:So a pound of water is 24 centimeters long, right?
Only at sea level
Gunkiemike · · Unknown Hometown · Joined Jul 2009 · Points: 3,492

I recall reading a few years back that among regular coffee drinkers, there is no diuretic effect until you hit 1500 mg or so of caffeine. But IME some cheap coffee can irritate the bladder and produce a profound need to pee.

kenr · · Unknown Hometown · Joined Oct 2010 · Points: 16,608

Keep in mind the Placebo effect ...
If you believe that coffee is a diuretic, maybe it will work as one for you.

In the careful "double-blind" studies they have given different groups of subjects caf or decaf coffee, sometimes lying about what they actually are drinking.

Double-blind studies have also been down with real and fake caffeine pills instead of coffee.

The main result is: Once you carefully measure the Placebo effect, there's little or no statistically significant additional effect from caffeinated coffee, or from actual caffeine.

Why you think about it, why should caffeine have a diuretic effect?

Really effective diuretic chemicals typically target the kidneys. Caffeine does not.

Ken

Gene S · · Unknown Hometown · Joined Sep 2015 · Points: 0
kenr wrote:Keep in mind the Placebo effect ... If you believe that coffee is a diuretic, maybe it will work as one for you. In the careful "double-blind" studies they have given different groups of subjects caf or decaf coffee, sometimes lying about what they actually are drinking. Double-blind studies have also been down with real and fake caffeine pills instead of coffee. The main result is: Once you carefully measure the Placebo effect, there's little or no statistically significant additional effect from caffeinated coffee, or from actual caffeine. Why you think about it, why should caffeine have a diuretic effect? Really effective diuretic chemicals typically target the kidneys. Caffeine does not. Ken
I believe I can crush a 5.12b… I'm still waiting for the placebo effect.
highaltitudeflatulentexpulsion · · Colorado · Joined Oct 2012 · Points: 35
Gene S wrote: I believe I can crush a 5.12b… I'm still waiting for the placebo effect.
This actually works. It works in me and I've seen it work in others. The key is being a good liar or getting lied to well.

"That's a good route, 11c, lots of fun, not too bad for the grade" is a great intro line to onsighting your first 12.

Of course with MP and guidebooks it's harder to pull off.

With experience and crankiness, this effect fades.
Who Dat · · Spinning Rock, MW · Joined Dec 2014 · Points: 5
highaltitudeflatulentexpulsion wrote: Widely believed and also false. Source Source Source and Source You have been educated.
Wrong.

Caffeine unarguably is a diuretic. Below are several (legitimate) sources:

ncbi.nlm.nih.gov/pubmed/210…
ncbi.nlm.nih.gov/pubmed/259…
ncbi.nlm.nih.gov/pubmed/251…

The last study does bring up an interesting point which may be relevant to this discussion.

Wiki for the sensible reader: en.wikipedia.org/wiki/Caffe…
Who Dat · · Spinning Rock, MW · Joined Dec 2014 · Points: 5
kenr wrote:Keep in mind the Placebo effect ... If you believe that coffee is a diuretic, maybe it will work as one for you. In the careful "double-blind" studies they have given different groups of subjects caf or decaf coffee, sometimes lying about what they actually are drinking. Double-blind studies have also been down with real and fake caffeine pills instead of coffee. The main result is: Once you carefully measure the Placebo effect, there's little or no statistically significant additional effect from caffeinated coffee, or from actual caffeine. Why you think about it, why should caffeine have a diuretic effect? Really effective diuretic chemicals typically target the kidneys. Caffeine does not. Ken
Caffeine does indeed reach the kidneys.

When you think about it, "proximal tubular adenosine receptor blockade" does occur in the kidneys after all.
kenr · · Unknown Hometown · Joined Oct 2010 · Points: 16,608

Thanks for giving us these findings with a different perspective.

Who Dat wrote:
> ncbi.nlm.nih.gov/pubmed/251…
> ... does bring up an interesting point which may be relevant to this discussion.

Yes this does seem relevant ... here's a quote:

"Caffeine exerted a minor diuretic effect which was negated by exercise.
Concerns regarding unwanted fluid loss associated with caffeine consumption are unwarranted particularly when ingestion precedes exercise."

Who Dat wrote:
> Wiki for the sensible reader: en.wikipedia.org/wiki/Caffeine...

What the "sensible reader" gets from that Wikipedia article is that caffeine is not a diuretic for people who ingest it regularly -- which applies to most people who ingest it at all.

Guideline #1: Don't be a jerk.

General Climbing
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