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Is a 'slow' swimming pool impeding world records?

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Re: Is a 'slow' swimming pool impeding world records?

#61

Post by davidmurdoch »

HPsquared wrote: post #19
davidmurdoch wrote: post #8

Earlier quoted context omitted.

To a lesser effect, there's also the surface tension of the water, which can be adjusted with salt and borates.

Density and viscosity must also play a role, or are those managed via temperature control?

Seems very plausible. I haven't noticed a speed difference in my own pool with temperature changes, but that might just be because the temperature itself can be so distracting. But I do feel like a salty pool makes me faster (maybe from buoyancy), and borates makes the water feel smoother and less "sticky" (something about surface tension changes with borates, it even makes the surface look different).

Re: Is a 'slow' swimming pool impeding world records?

#62

Post by aziaziazi »

loloquwowndueo wrote: post #54
dp-hackernews wrote: post #9

Earlier quoted context omitted.

All protein derived from veggies are considered incomplete when compared to animal derived protein, which also require substantially more volume to obtain the same nutritional content. You only need to look at the amount of waste (feces) between a veggie based diet and an animal based diet - the difference is staggeringly different. I.e. far less waste is produced, because far less is required when eating animal base…

Dunno man, I poop a lot more (and stinkier) when I eat more meat as compared to vegetarian dishes. Considered incomplete by whom? References?

+1 for the stinkness. Also you very feel those fibers that helps everything slide as a soap. Or is it a the fence hydratation level, lower for animal proteins that stays longer in the belly?

Re: Is a 'slow' swimming pool impeding world records?

#63

Post by dp-hackernews »

Etheryte wrote: post #22
dp-hackernews wrote: post #9

Earlier quoted context omitted.

All protein derived from veggies are considered incomplete when compared to animal derived protein, which also require substantially more volume to obtain the same nutritional content. You only need to look at the amount of waste (feces) between a veggie based diet and an animal based diet - the difference is staggeringly different. I.e. far less waste is produced, because far less is required when eating animal base…

This argument isn't even anywhere close to making any sense. The amount of waste that's left after food is digested doesn't indicate anything about the nutritional values of the food you've consumed. The reason there's more waste after eating veggies is because veggies generally contain high levels of fiber and the human body cannot digest fiber. (Aside: this doesn't mean fiber isn't good or useful for you, consuming…

It males sense if you consider the volume/weight/quantity values and compare them to the basic requirements for life - rather than what the psych wants, which is often overindulgent due to the other non-animal based type of nutrition(?) being consumed.

I wonder what the Inuit use as a natural source of fiber.

Re: Is a 'slow' swimming pool impeding world records?

#64

Post by HPsquared »

davidmurdoch wrote: post #61
HPsquared wrote: post #19

Earlier quoted context omitted.

Density and viscosity must also play a role, or are those managed via temperature control?

Seems very plausible. I haven't noticed a speed difference in my own pool with temperature changes, but that might just be because the temperature itself can be so distracting. But I do feel like a salty pool makes me faster (maybe from buoyancy), and borates makes the water feel smoother and less "sticky" (something about surface tension changes with borates, it even makes the surface look different).

Oh and of course the cooling effect. That's a factor for long distances especially if the water is too warm.

Re: Is a 'slow' swimming pool impeding world records?

#65

Post by esperent »

chatmasta wrote: post #48
dist-epoch wrote: post #38

Earlier quoted context omitted.

[flagged]

If you put them in the slow lanes then there would be an incentive to place poorly in qualifying rounds.

Don't the qualifying rounds determine whether you get to compete or not? So if someone intentionally slowed down, even a fraction of a second, there's a chance they wouldn't get to compete at all.

Re: Is a 'slow' swimming pool impeding world records?

#66

Post by sdwr »

echoangle wrote: post #25
lou1306 wrote: post #23

Earlier quoted context omitted.

But a lot of the swimmers themselves are not able to go anywhere near their personal bests: this is a sharp reversal from past Olympics, where many athletes reached new personal records. Plus, they are the worldwide foremost experts on competitive swimming. Definitely I would be more interested in their evaluation of a swimming pool rather than trust "research results" from the company that built the pool in question…

Being good at swimming doesn’t mean you can evaluate the pool performance better than everyone else. I trust someone running a CFD analysis of a pool more than a competitive Olympic swimmer when it comes to the effect of pool depth. It’s very hard to make accurate statistical assessments from intuition. Edit: maybe I’m not making myself clear: I don’t doubt they are slower in the current pool than they were before. B…

I trust someone who's life is getting that 2/10 of a second to know when the 2/10 of a second is impeded.

The how can be argued

Re: Is a 'slow' swimming pool impeding world records?

#67

Post by teddyh »

dsr_ wrote: post #53
viraptor wrote: post #27

Earlier quoted context omitted.

> they are the worldwide foremost experts on competitive swimming On swimming, sure. But not fluid dynamics. It's a bit like music listeners shouldn't be treated as experts on music quality, or you'll get the audiophile nuts who need gold connectors. Some combination of personal experience for comfort and objective measurements for performance would be much better.

It's strange that you would pick on gold connectors. Gold is an excellent conductor and does not corrode in air, so it makes a great plating material. In the quantities needed for plating, it's not too expensive, either. Silver corrodes relatively quickly and is expensive; that's a bad tradeoff against copper, which is much cheaper and nearly as conductive. So: gold-plated connectors on copper wires are extremely com…

> Gold is an excellent conductor

Actually, gold is a worse conductor than both copper and silver, and only a little better than aluminum.

> and does not corrode in air

This is the real reason for plating contacts in gold. But gold wires would be a bad idea, since they would be worse than both copper and silver wires.

Re: Is a 'slow' swimming pool impeding world records?

#69

Post by chatmasta »

esperent wrote: post #65
chatmasta wrote: post #48

Earlier quoted context omitted.

If you put them in the slow lanes then there would be an incentive to place poorly in qualifying rounds.

Don't the qualifying rounds determine whether you get to compete or not? So if someone intentionally slowed down, even a fraction of a second, there's a chance they wouldn't get to compete at all.

Yeah, but it would create weird incentives where e.g. if two people are way ahead of the pack, one of them wants to finish after the other. So do they just wait until the rest of the field catches up and then try to trick the other guy into hitting the wall first?

Better to just avoid it by keeping incentives aligned with winning your qualifying heat.

Re: Is a 'slow' swimming pool impeding world records?

#70

Post by tweetle_beetle »

samldev wrote: post #5

I was a college swimmer, qualified for Olympic Trials in 2012 and 2016. There are absolutely slow and fast pools. It basically comes down to two things: 1. The depth - which is only 7ft in Paris, unusually shallow for a competition pool. 2. The sides. Does the water spill over the sides into the gutters, or smash into a wall and bounce back, creating more chop. A trained eye can see all the swimmers in Paris struggli…

I'm no expert, buy there also seems to be loads more stuff lying on the bottom of the shallow floor than I remember from previous Olympics. Not even sure exactly what it is - large white panels and other equipment that the swimmers don't look that far off touching when underwater (not the robot cameras which are relatively unobtrusive).
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