The current advice (from doctors and public health types) seems to be binary: always wear a helmet when biking, never wear a helmet when walking or driving. That seems to be missing some nuance!
I would tweak it to say: consider a helmet when skiing fast, biking on single track, or biking very fast in a tight pack with friends. But then what about walking and driving (when most American TBIs happen)? Never? Not even in the most dangerous conditions: night time, snowy, icy or wet roads? Walking on ice or snow? No, it is quite safe, though when bad things happen, it is bad.
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I spent a number of years in the motorcycle safety world and saw enough to convince me a helmet is a great idea for many activities. (Escpecially motorcycling.)
"Helmets can be used to decrease closed-head injuries acquired during athletic activities, and are considered necessary for sports such as American "tackle" football, where frequent head impacts are a normal part of the game. However, recent studies have questioned the effectiveness of even American football helmets, where the assumed protection of helmets promotes far more head impacts, a behavior known as risk compensation. The net result seems to have been an increase, not decrease, in injuries.[20] The similar sports of Australian-rules football and rugby are always played helmetless, and see far fewer traumatic brain injuries. (See Australian rules football injuries.)
Bicycle helmets are perhaps the most promoted variety of helmet, based on the assumption that cycling without a helmet is a dangerous activity, with a large risk of serious brain injury. However, available data clearly shows that to be false. Cycling (with approximately 700 American fatalities per year from all medical causes) is a very minor source of fatal traumatic brain injury, whose American total is approximately 52,000 per year.[21] Similarly, bicycling causes only 3% of America's non-fatal traumatic brain injury.
Still, bicycle-helmet promotion campaigns are common, and many U.S jurisdictions have enacted mandatory bicycle-helmet laws for children. A few such jurisdictions, a few Canadian provinces, plus Australia and New Zealand mandate bicycle helmets even for adults. A bicycle-helmet educational campaign directed toward children claimed an increase in helmet use from 5.5% to 40.2% leading to a claimed decrease in bicycle-related head injuries by nearly 67%.[22] However, other sources have shown that bicycle-helmet promotion reduces cycling, often with no per-cyclist reduction in traumatic brain injury.[23][24]
Estimates of bicycle-helmet use by American adults vary. One study found that only 25-30% of American adults wear helmets while riding bicycles,[25] despite decades of promotion and despite sport cyclists' adoption of helmets as part of their uniform."
... so, it seems to me that these pro-helmet admonishments are based on selective reading of statistics, with a dollop of confirmation bias that helmets "work." But we can also look at the statistics and acknowledge that, statistically speaking, the idea of increasing bicycle safety via helmet use isn't actually working. At the end of the day, I reckon folks will choose to do the thing that gives them a greater sense of agency (like buying a big SUV to feel safer on the road, despite ostensibly higher risk of rollover and greater risk to others), but whether it actually makes things better may well be "in the noise."
I spent a number of years in the motorcycle safety world and saw enough to convince me a helmet is a great idea for many activities. (Escpecially motorcycling.)But I want to add that this article on survivorship bias is a good one to consider: https://en.wikipedia.org/wiki/Survivorship_bias
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Most bike crashes are solo falls.
Only a confused mind could mistake choice for freedom.
Choice always implies that a sacrifice has to be made.
Choice is a duality in desire.
Two conflicting desires always imply the sacrifice of one in favour of the other.
Choice is the paradigm of sacrifice, cost, unfulfillment and incompleteness.
It is strange that in such a paradigm freedom could have any meaning at all when sacrifice is the rule.
.
If freedom has a meaning, it is freedom from choice, freedom from sacrifice, freedom from incompleteness and frustration.
Only the divided heart has to choose.
Only the broken heart has to keep on sacrificing a part of itself in order to save another.
As long as the broken heart accepts choice, it cannot heal and remains broken.
The freedom to choose is truly the obligation to sacrifice one’s heart.
But for a heart who only knows sacrifice, the only way to find a peace
of mind is to turn an obligation into a freedom and a sacrifice into an
opportunity for gain.
.
A choosing heart doesn’t know what freedom means because it replaced its obligation to sacrifice by its freedom to choose.
The whole frame of reference has been inverted in order to make the unacceptable acceptable.
The words have been turned upside down in order to conceal the reality of its slavery.
The certainty of loss is turned into an opportunity for gain.
The immediate loss is not perceived, only the potential gain is pursued.
Unless choice is seen for the obligation to sacrifice that it is, the individual remains in dreamland.
The heart remains in chains.
.
Undivided, not compelled to choose, the free heart is whole, all for itself, in love with itself.
It cannot gain anything simply because it is already whole.
When there is nothing to gain, nothing has been lost. "