Saturday, February 19, 2022

Men competing in Women's Swimming

There is a man in the Ivy League competing in Women's swimming this year.

He is crushing the women he is competing against. This is not a big surprise.

As an Engineer who graduated in Mechanical Engineering about a million years ago, I want to point out a few things that popped into my mind.

Sailing ships

A ship hull that is not planing on the surface generates bow and stern waves.

They create a valley that the ship is sailing within and the nature of fluid dynamics is such that the longer the water-line the faster the ship can sail before that valley becomes a limiting factor.

Velocity(max) in knots = 1.34 * SQRT(length in feet). A human who is 6'-4" will have a "max velocity" that is 11% faster than a human who is 5'-2" tall 

Men, in general, grow to be taller post-puberty than women. Taller swimmers will have an inherently faster "max speed" due to fluid dynamics.

VO2Max

VO2 Max is the rate that your body can absorb oxygen from the air normalized by your body-weight.

Normative values for women (Heywood, 1998, ml/kg/minute)

AgeVery PoorPoorFairGoodExcellentSuperior
13-19<2525 - 3031 - 3435 - 3839 - 41>41
20-29<2424 - 2829 - 3233 - 3637 - 41>41
30-39<2323 - 2728 - 3132 - 3637 - 40>40
40-49<2121 - 2425 - 2829 - 3233 - 36>36
50-59<2020 - 2223 - 2627 - 3132 - 35>35
60+<1717 - 1920 - 2425 - 2930 - 31>31

Normative values for men (Heywood, 1998)
AgeVery PoorPoorFairGoodExcellentSuperior
13-19<3535 - 3738 - 4445 - 5051 - 55>55
20-29<3333 - 3536 - 4142 - 4546 - 52>52
30-39<3131 - 3435 - 4041 - 4445 - 49>49
40-49<3030 - 3233 - 3839 - 4243 - 47>48
50-59<2626 - 3031 - 3536 - 4041 - 45>45
60+<2020 - 2526 - 3132 - 3536 - 44>44

VO2Max is the amount of oxygen that can be absorbed through your lungs and distributed via your circulatory system. This quantity is determined by geometry of lungs, ribcage, heart and blood vessels which in turn is determined by hormonal signals in the period +/- 2 years of puberty.

Men athletes, ages 20-29 have about 20% higher VO2Max then women athletes.

Real-world data

VO2 max (ml/kg/min)AthleteGenderSport/Event
96.0Espen Harald BjerkeMaleCross Country Skiing
96.0Bjorn DaehlieMaleCross Country Skiing
92.5Greg LeMondMaleCycling
92.0Matt CarpenterMaleMarathon Runner
92.0Tore Ruud HofstadMaleCross Country Skiing
91.0Harri KirvesniemMaleCross Country Skiing
88.0Miguel IndurainMaleCycling
87.4Marius BakkenMale5K Runner
85.0Dave BedfordMale10K Runner
85.0John NgugiMaleCross Country Runner
    
73.5Greta WaitzFemaleMarathon runner
71.2Ingrid KristiansenFemaleMarathon Runner
67.2Rosa MotaFemaleMarathon Runner

Measured VO2Max of some world-class athletes.

A man competing as a woman in swimming has an unfair advantage even if his current testosterone levels are the same as the women he competes against because the physical changes at puberty still advantage him vis-a-vis woman in terms of "hull speed" and VO2Max which are driven by the geometry of his anatomy.

9 comments:

  1. From a humorous and chauvinistic perspective, this is proof that men can do everything better than women, including being women.

    From a more rational and serious perspective, having trans-men in women's sports is ridiculous, ignorant of biological reality and likely the end of women's sports, at least insofar as they were designed to let women compete on a level playing field or swimming pool.

    ReplyDelete
    Replies
    1. I, for one, do not want to pass a seven pound baby through my penis. I concede women are far superior with regard to non-Caesarian deliveries.

      Delete
    2. Clearly we're both insufficiently woke. After all, Facebook et al now has a male pregnancy emoji, which apparently stands for the woke proposition that men can be pregnant and must be able to do so in splendid fashion.

      Delete
    3. I will pass on pregnancy but have no objection to you giving it a try.

      May I be there at delivery and take video?

      Delete
    4. Did Pete Bttegieg have a cesarian?

      Delete
  2. There you go with those pesky facts again...

    ReplyDelete
  3. ERJ: men CAN "fail" a pregnancy test.

    If his gonadal cancer is secreting HCG, he will register as "pregnant"

    In more sane times, such a man would be hustled off to urology/oncology RFQ.

    ReplyDelete
  4. I for one encourage it, I love it!!!!

    Sun Tzu teaches us to never interfere when an enemy is destroying itself.

    Think about it... One of the 'challenges' we (you and me) face dealing with them (you know who), is their willingness to suspend all reality and previously proven scientific beliefs because, 'feelings'. You want to pretend you're a cat? Sure thing, Mittens!
    Of course the physical realities of the world will make using a litterbox difficult for this individual, but no matter, Mittens has spoken!
    So let biological men compete against womyn in the name of diversity, or whatever asinine emotion is drifting in the air that day. When they complain, remind them who's world we're living in, and walk away, do nothing, let them wallow in their own ignorance and imcompetence to the point the whole affair is a pointless charade.
    It only degrades them further. You simply cannot deny the realities of physics anymore than Bruce Jenners balls. Suggesting otherwise proves for all to see you're an idiot.

    ReplyDelete
  5. The NCAA, as the governing body overseeing this farce, has disgraced itself by corrupting its purpose in holding up the highest standards of amateur sportsmanship. I myself remain amazed that these young men, who are low-middling performers amongst their original cohort, have not been given personal corrective actions by fathers who have had to deal with the fallout from their own daughters, not to mention the damage to their investment in the well-being of said daughters and in the development of their fullest potential as athletes.

    But the most amazing thing, really incredible when you think about it, is the deafening silence everywhere from the feminists. What happened, Ms. ladies? Have you become selective about which women whose pursuit of fair play you defend? Or should we simply conclude that you have thrown in the towel and abandoned your cause because you've finally realized that men really are superior in every way?

    ReplyDelete

Readers who are willing to comment make this a better blog. Civil dialog is a valuable thing.