www.lesswrong.com/posts/bZ2w99pEAeAbKnKqo/optimal-exercise
2 corrections found
You do not have testosterone;
Women do have testosterone; they typically just have much lower levels than men.
Full reasoning
This sentence is factually incorrect. Females also produce testosterone.
Cleveland Clinic explains that "everyone makes testosterone" and that females also need testosterone, but at a much lower level. It also states that the ovaries, adrenal glands and other tissues and cells produce testosterone.
The Endocrine Society likewise states that the main reproductive hormones include testosterone, and that these hormones are produced in the ovaries (in females) and testes (in males).
So the accurate point would be that women generally have less testosterone than men—not that they have none.
2 sources
- Low Testosterone In Women: Causes, Symptoms & Treatment
Everyone makes testosterone, but males make the most testosterone. Females also need testosterone, but at a much lower level. Your ovaries, adrenal glands and other tissues and cells produce testosterone.
- Reproductive Hormones | Endocrine Society
The main reproductive hormones estrogen, testosterone, and progesterone ... are produced in the ovaries (in females) and testes (in males).
Studies have never shown a measured benefit to consumption above .64g/lb of bodyweight
Later meta-analysis evidence found resistance-training gains continuing up to about 1.62 g/kg/day, which is roughly 0.73 g/lb—not 0.64 g/lb.
Full reasoning
This absolute claim (“never shown”) is too low and is contradicted by later systematic-review evidence.
A 2018 systematic review and meta-analysis in British Journal of Sports Medicine found that protein supplementation during resistance training improved gains in fat-free mass and that no further gains were seen only beyond 1.62 g/kg/day of total protein intake. Converting that threshold gives about 0.73 g/lb/day, which is higher than the post’s cutoff of 0.64 g/lb/day.
In other words, the meta-analysis found evidence of benefit up to roughly 0.73 g/lb/day, so it is incorrect to say studies have never shown benefit above 0.64 g/lb/day.
This does not mean everyone needs very high protein intake; it means the specific quantitative ceiling in the post is stated too low.
1 source
- A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults - PubMed
Protein supplementation beyond total protein intakes of 1.62 g/kg/day resulted in no further RET-induced gains in FFM. ... With protein supplementation, protein intakes at amounts greater than ~1.6 g/kg/day do not further contribute RET-induced gains in FFM.