[–] Lipsy [OP] #bornnotworn 31 points Edited

Linked is a graph of the normal range[1] of estradiol, which is almost alws what people mean by "estrogen"[2] .

Periods—the real, live, Female, uterussy kind—are shown as the first 4 days (t = 0 through t = 4) of this idealized menstrual cycle. See how yr estrogen levels are 30-70 pg/mL during your real, actual, not-just-boytears period? Hang onto that for a sec.

and now i present:

• The normal adult male range for estradiol: 5-50 pg/mL

• The level of estradiol that endocrinologists try to maintain in TIMs: 100-200 pg/mL

That's right my luvs—Periods are the exact time when our estrogen levels hugely overlap with those of ordinary men, but NOT AT ALL with TIMs... BECAUSE TIMs are shooting up estrogen🤪 Ahahahahahha. How grand is that?

The other delightful little irony of TIM H"R"T is how so many (most?) AGPs are already at perimenopausal—soon to be menopausal—ages for real, actual, classical type Women.

From menopause onward, MALE estrogen levels are slightly HIGHER than Female levels (this is actually the main reason why old men rarely have osteoporosis.)
So, "truly" "awfentic" H"R"T for middle-aged AGPs should actually involve small doses of estrogen BLOCKERS. Ahahaha. They're all such derps.

Normal range is defined as percentile 2.5 through percentile 97.5. Looks weird but works out to +/- exactly two standard errors or standard deviations.

The body manufactures and uses several other estrogens besides estradiol—most notably estrone. For some ob/gyn or oncology purposes, you might get labwork that includes estrone and total blood estrogens, in addition to estradiol.

[–] real_feminist 7 points Edited

Interesting. I remember my coach in HS telling us that we should be at our fastest during our periods and that never made sense to me until now. (Like, it might not be true because it's more complicated than that but now I know where it came from.)

I'm pretty sure the data shows that female athletes consistently perform worse while menstruating.

[–] friedparata 6 points Edited

i wouldn't be surprised. i don't think I'd have been able to even walk 10 meters the day before yesterday, while I was writhing in pain and vomiting out my breakfast from it, barely having the strength to speak -- let alone run.

basically - period cramps + running = worse performance. because she is in pain. anyone would underperform with pain. :/

[–] Maplefields 6 points Edited

Female athletes perform better around ovulation (day 14). It's when you feel the most energetic. It makes sense because our testosterone peaks during that time in the cycle. See hormone graph, the yellow line.

[–] Lipsy [OP] #bornnotworn 1 points

is this sprints? cross country?

Hormonally modulated changes in musculature take many years, so, if your coach's reasoning has anything to do with transitory levels of estrogen versus testosterone, it's pure bunk.
If this isn't obvious, ask yourself whether just 4 days' worth of changes even at the height of yr pubertal growth spurt—when your hormone levels are off the charts far more than during any phase of the adult menstrual cycle—would cause perceptible changes in athletic performance. The whole idea is just kinda silly.

... Above and beyond the fact that estrogens, in general, are NOT oppressive to athletic performance—except insofar as higher-than-average estrogen levels lead to extra correct secondary sexual development, which gets in the way (literally) in sports such as gymnastics and swimming.

In fact, male athletes who have a combination of lots of skeletal muscle ("built") and an unusually healthful bodyfat distribution (very little fat in the "beer belly" area; small waist vs. broad muscular shoulders and thighs) tend to be substantially above average in testosterone AND estrogens.
High testosterone with low overall estrogens—a very very weird combination, because estradiol is one of the products when the body metabolizes testosterone—leads in the long term to a prematurely balding, weird build where a man sports a huge beer belly on an otherwise stick-like body.

The two ways you might realistically see performance changes over a menstrual cycle are:

• Worsening performance because of painful periods,

• slight, but possibly significant, changes based on gains or losses of body weight.

In the latter case, for most Women this would mean the possibility of slightly faster running times during the last few (PRE-menstrual) days of the menstrual cycle, which is usually the low point of cyclical body weight changes.
Most Women whose weight is affected by the menstrual cycle tend to gain a few lbs during menstruation, so such effects would reverse over your actual period days.

Is the blue line TIMS and women the purple line? I don't get it.

[–] Lipsy [OP] #bornnotworn 0 points

All 3 plots are for Women:
blue = top of normal range (percentile 97.5)
red = median (percentile 50)
purple = bottom of normal range (percentile 2.5)

TIMs who are managed according to current endocrine advice are approximately horizontal plots somewhere between 100-200 (not shown). The point is that they medicate themselves to a point that's way too high for Women having actual periods lol

This is very interesting but I don't think it belongs in this circle.

[–] Lipsy [OP] #bornnotworn 2 points

I didn't know where to put it tbh. I settled on here because it makes even more of a mockery of "trans menstruation" than it alrdy is.