151–160 of 206 posts
My personal opinion is that the bicycle is already invented and its excellent energy efficiency is hard to beat.
Earlier quoted context omitted.
I am NOT anyone with relevant credentials, just a lot of running over the last 40 some years in a lot of shoes. That said, I no reason to think that VaporFlys would help with plantar fasciitis. I hypothesize that it's the energy return (which is energy not pounding the legs) is what saves the legs, and I don't know that help plantar problems. And the shoes are designed around running, not walking. Mainly, though, is…
My thinking is that a spring that can provide power also absorbs power. Basically a low-pass filter, like a capacitor. IDK. I've tried the socks, the boots you wear while you try to sleep but can't because they itch too much, and all kinds of shoes. Honestly, I'm at the point where I'll try just about anything.
An ideal spring (or a capacitor) should not absorb any energy.
Earlier quoted context omitted.
I wonder if that would do anything for my plantar fascitis... I made a mistake in shoe choice for a vacation one year, before I knew how much my wife absolutely insists on walking at least 10 miles a day. That was 8 years ago and I still have pretty severe pain almost every morning.
Take this with a bag of salt, but I've heard people get notable improvements in joint, feet, leg health from switching to barefoot shoes. They also tend to be extremely comfortable. I've been using them exclusively ~5 years and ran a half-marathon in them. For what it's worth, a physical therapist told me my feet are remarkably muscular. I like the UK manufacturer Freet, btw.
(Still, your mileage may vary, I included lots of exercise specifically for the transition. And still run in Altras.)
Earlier quoted context omitted.
I wonder if that would do anything for my plantar fascitis... I made a mistake in shoe choice for a vacation one year, before I knew how much my wife absolutely insists on walking at least 10 miles a day. That was 8 years ago and I still have pretty severe pain almost every morning.
Take this with a bag of salt, but I've heard people get notable improvements in joint, feet, leg health from switching to barefoot shoes. They also tend to be extremely comfortable. I've been using them exclusively ~5 years and ran a half-marathon in them. For what it's worth, a physical therapist told me my feet are remarkably muscular. I like the UK manufacturer Freet, btw.
I suppose that different activities require different footwear.
Earlier quoted context omitted.
I wonder if that would do anything for my plantar fascitis... I made a mistake in shoe choice for a vacation one year, before I knew how much my wife absolutely insists on walking at least 10 miles a day. That was 8 years ago and I still have pretty severe pain almost every morning.
Hey there! I don’t know what you’ve done to treat it so far, but I am somebody who went through a year and a half of very painful plantar fasciitis after a few years of moderate pain. I tried every single solution under the sun and am actually “cured”! Some unsolicited input, if you want: 1) Kuru tennis shoes with an insert for PF are excellent. 2) Oofos slippers by my bedside even today. They provide such good relie…
What does this mean?
Earlier quoted context omitted.
So what? These people will no longer be your run of the mill "runner". They will be augmented, much the way we're augmented by using bicycles and skis, etc. The original claim that if someone were to be able to move at these speeds that they would suddenly need to be heavily bogged down in safety gear is flat out ridiculous. Comparing it to other sports where we move at similar speeds should be more than enough evide…
People do ski faster than that but low friction means slower deceleration which is a huge reason it’s even possible to learn reasonably safely. This applies to basically all high speed winter sports and is under appreciated by most viewers. Similarly landing from a jump or fall on a hill the force vectors mean people are mostly sliding on the surface resulting in significantly less forceful impacts. Biking at 45-48 M…
Not sure where you get that from. Amateur road cyclists can pretty easily reach 50MPH given a long enough hill and do so pretty uneventfully.
That's dressed in just shorts, jersey, helmet and fingerless gloves.
A professional racing cyclist could easily break 60MPH on closed roads and even 80MPH on occasion.
For someone like Tom Pidcock who knows[1]. In the linked video he's topping out at about 100kph (60mph) but it's worth noting that that's without being allowed to sit on the top tube of this bike. They banned that (even though it wasn't linked to any crashes).
The bike manufactures will eventually just add dropper posts to all pro road bikes and those speeds will go up again.
Earlier quoted context omitted.
Take this with a bag of salt, but I've heard people get notable improvements in joint, feet, leg health from switching to barefoot shoes. They also tend to be extremely comfortable. I've been using them exclusively ~5 years and ran a half-marathon in them. For what it's worth, a physical therapist told me my feet are remarkably muscular. I like the UK manufacturer Freet, btw.
My god, yes. I had knee and ankle pain while running, then also while walking. Too much padding was allowing me to walk incorrectly. After being ‘prescribed’ flat, flexible, low-stack shoes, all the pain went away. My toes are more spread out and my abductors are thicker. Nice gains! (Still, your mileage may vary, I included lots of exercise specifically for the transition. And still run in Altras.)
[edit] Unable to find the one i searched but found this article claiming a 2-3x times bodyweight impact on the legs when wearing shoes.
https://news.harvard.edu/gazette/story/2010/01/barefoot-runn...
[edit]
Another great study found while searching
> A large majority (68%) of runners participating in the study experienced no new injuries after starting barefoot running. In fact, most respondents (69%) actually had their previous injuries go away after starting barefoot running.
https://www.sciencedirect.com/science/article/pii/S209525461...
Earlier quoted context omitted.
So what? These people will no longer be your run of the mill "runner". They will be augmented, much the way we're augmented by using bicycles and skis, etc. The original claim that if someone were to be able to move at these speeds that they would suddenly need to be heavily bogged down in safety gear is flat out ridiculous. Comparing it to other sports where we move at similar speeds should be more than enough evide…
People do ski faster than that but low friction means slower deceleration which is a huge reason it’s even possible to learn reasonably safely. This applies to basically all high speed winter sports and is under appreciated by most viewers. Similarly landing from a jump or fall on a hill the force vectors mean people are mostly sliding on the surface resulting in significantly less forceful impacts. Biking at 45-48 M…
Two decades ago I was doing downhill MTB. On a road section it was quite frequent for me to reach those speeds†; and that's with a MTB (tuned to that end), friends†† with road bikes reached these speeds with ease, some of them regularly hit 80-90kph on specific sections.
One of the wide hairpin turns happened to be littered with gravel, and as I was banking for the turn the bike wheels started zipping off laterally as it the ground was ice, propelling both of us sideways at full speed towards the downward outer bank.
Luckily a) I had slowed down to approach the turn so I was going more like 45-50kph and b) the bike had much less ground grip than my body so it flied away while body-ground friction (painfully) slowed me down to a stop before I hit any tree or rock down the bank. Sheer luck had it that I walked away from the event with only a few bruises and a lot of scratches (one of my elbows still bears burn scars)
† Top recorded speed ever was 74 kph, at which point gear ratio was such that `cat pedalling > /dev/null`
†† c.a 1995-1999 they biked regularly with the then young Julien Absalon (I only biked with him once): https://en.wikipedia.org/wiki/Julien_Absalon.
I couldn’t find a mention of oxygen usage. Given that running at speed is aerobic past 800m or so (for Olympic-level athletes. Mortals hit that point way earlier), would athletes actually be able to make the extra effort?
My understanding is that a species' maximimum speed depends simply on muscle mass. The reason elephants don't outrun cheetahs is that they accelerate more slowly and run out of energy before hitting the top speed their muscles could produce. Look up allometry for more. There are formulas for calculating top speed based on mass.
If so, that doesn’t mean that they would get faster if only they got more muscle. I would expect that species evolve towards not having more muscle than they can effectively use. I think looking at elite human runners supports that. At longer distances, they get less muscular.
> The reason elephants don't outrun cheetahs is that they […] run out of energy before hitting the top speed their muscles could produce. > Look up allometry for more. There are formulas for calculating top speed based on mass.
I think our best knowledge is that adding more muscle only works for a limited time. https://news.cgtn.com/news/3d51544f7767444e/share.html:
“If muscles were all that mattered "elephants would reach maximum speeds of about 600 kph (370 mph)," she told AFP.
Instead, tuskers peak at about 34 kph (21 mph).
Big beasts, in other words, run out of so-called anaerobic energy, supplied by the muscles, before being able to reach their theoretically maximum speed.“
Earlier quoted context omitted.
My thinking is that a spring that can provide power also absorbs power. Basically a low-pass filter, like a capacitor. IDK. I've tried the socks, the boots you wear while you try to sleep but can't because they itch too much, and all kinds of shoes. Honestly, I'm at the point where I'll try just about anything.
> My thinking is that a spring that can provide power also absorbs power. An ideal spring (or a capacitor) should not absorb any energy.