V. That is a fantastic post. Very well put.
As a coach and healthcare professional, I strongly recommend that anyone who wants to get down to some ideal race weight should have their body fat percentage tested to establish if it is realistic. If you get skinfold testing done, it will be more accurate if the person doing it has a lot of experience and also if they use more points. Having said that, hydrostatic weighing is of course the best option.
I participated in a research study once upon a time when I was really quite lean. The skin fold tests had my body fat estimate at 19% while my hydrostatic weighing put me at 14.5%. The explanation I got is that my BF distribution is not typical of women, that I have less intramuscular fat than predicted. So in my case the women's formula used to predict body fat percentage with skinfold testing is quite inaccurate. Having said that, what Veronica says about not worrying about the numbers as absolute values but instead using them as guidelines to look at trends in fat loss or gain is an excellent way to use these tools.
Lastly, think very hard about what the cost of losing that last 5 lbs is compared to what you will gain. I mean this in terms of performance, but also life balance. Is someone paying you to race? If not, is a trophy worth being unhealthy and prone to other issues like bone loss and immune system weakness? Is losing the weight really going to make you faster? Or is it possible that your performance may go down? Is what you will have to go through to loose the weight going to increase your life "stress-load"? If it is, your body may start to produce more cortisol which tends to make us hold onto/or gain weight instead of losing it.
Living life like there's no tomorrow.
http://gorgebikefitter.com/
2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR
2014 Soma B-Side SS