zzzz, I am sorry if I came across as aggressive - gosh, I have read my post again and I can't see it! Baffled as to why you think my careful, polite, and neutral tone should come across that way :(
I have had years of breastfeeding experience with my children, don't worry about that :) I am an NCT breastfeeding counsellor and concerned that mothers get good info as well as encouragement and support to breastfeed, and I'm aware of the myths around.
You talked about measuring to within '1 g' - possibly a typo? 10 gram increments do not mean that scales will do that accurately, though....only top quality, professional-quality, precision-scales, calibrated and serviced regularly can be relied on to do that.
You didn't make it clear you were speaking from experience only - your first post stated quite categorically that eating, drinking and resting have a 'huge impact' on breastfeeding quality and quantity and it is not only untrue, it is also very undermining to breastfeeding....someone with problems that need addressing in a different way could go off down the wrong track completely! You went on to share other info that was incorrect - I am sure all this was well-meant, but so was my post correcting your info.
Here's some references (some of them are articles which have references in them):
www.analyticalarmadillo.co.uk/2010/07/foremilkhindmilk-and-lot-of-confusion.html
www.kellymom.com/bf/supply/foremilk-hindmilk.html
www.lalecheleague.org/NB/NBMarApr04p44.html
www.ncbi.nlm.nih.gov/pubmed/9746642
this is
Breastfeeding: Unraveling the Mysteries of Mother's Milk....1996 but a classic overview showing maternal nutrition, lifestyle eg rest, stress, is not a factor
There are no studies I have seen comparing bf with regard to rest alone - but there are a few looking at stress and mood (and finding no difference).
However, the fact is we know that historically (meaning over 100,000s of years!), mothers in general work a lot more and rest a lot less than we do these days, and it makes perfect sense for lactation to remain robust and unaffected by mothers' 'lifestyle weaknesses'.
I have a lot of references but don't want to bombard you, but if you want more, let me know :)