helmets increase danger
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From: David Hansen on 8 Apr 2010 02:20 On Wed, 7 Apr 2010 11:04:49 -0700 (PDT) someone who may be Derek C <del.copeland(a)tiscali.co.uk> wrote this:- >The participants in most dangerous high speed sports, such as motor >racing, motorbike racing, downhill skiing, skateboarding, downhill >mountain biking, horse racing, show jumping, etc, etc, wear head >protection of some sort. Cycling is not a dangerous high speed sport, it is a means of getting to the shops and so on. Next. -- David Hansen, Edinburgh I will *always* explain revoked encryption keys, unless RIP prevents me http://www.opsi.gov.uk/acts/acts2000/ukpga_20000023_en_8#pt3-pb3-l1g54
From: Derek C on 8 Apr 2010 02:31 On 7 Apr, 21:29, john wright <j...(a)pegasus.f2s.com> wrote: > On 07/04/2010 20:19, Tony Raven wrote: > > > > > > > n...(a)cam.ac.uk wrote: > > >>>> The result is that we simply do not know whether wearing a bicycle > >>>> helmet is likely to increase or reduce the risk of brain damage. > >>>> Either is possible, but the statistics indicate that their effect > >>>> is very small, whichever way it is. > > >>> Typical psycholist reply! > > >> I don't think that you can spell "statistician" :-) I am not the > >> only one who has come to that conclusion. > > >> Regards, > >> Nick Maclaren. > > >http://en.wikipedia.org/wiki/File:Adult_cyclist_head_injuries_versus_... > > If it were up to me I would see no correlation at all between helmet > wearing and head injuries. YMMV > > -- I see a reduction in percentage of head injuries from about 58% to about 42% over the period of the graph, although no obvious big reduction when the percentage of cyclists wearing helmets went up. Without seeing the raw data and knowing on what basis it was collected, it is difficult to draw any conclusions. In particular what are the head injuries a percentage of? If it's hospital casualties, it may just prove that fewer cyclists were seriously injuried enough to require hospital treatment after accidents, once helmet wearing become commonplace. Derek C
From: john wright on 8 Apr 2010 02:37 On 08/04/2010 07:20, David Hansen wrote: > On Wed, 7 Apr 2010 11:04:49 -0700 (PDT) someone who may be Derek C > <del.copeland(a)tiscali.co.uk> wrote this:- > >> The participants in most dangerous high speed sports, such as motor >> racing, motorbike racing, downhill skiing, skateboarding, downhill >> mountain biking, horse racing, show jumping, etc, etc, wear head >> protection of some sort. > > Cycling is not a dangerous high speed sport, it is a means of > getting to the shops and so on. Cycling as such does not appear in the list of dangerous high speed sports. It isn't one, but all the same people get killed doing it, as you yourself point out frequently. -- John Wright Use your imagination Marvin! Life's bad enough as it is - why invent any more of it.
From: Derek C on 8 Apr 2010 02:49 On 8 Apr, 07:20, David Hansen <SENDdavidNOhS...(a)spidacom.co.uk> wrote: > On Wed, 7 Apr 2010 11:04:49 -0700 (PDT) someone who may be Derek C > <del.copel...(a)tiscali.co.uk> wrote this:- > > >The participants in most dangerous high speed sports, such as motor > >racing, motorbike racing, downhill skiing, skateboarding, downhill > >mountain biking, horse racing, show jumping, etc, etc, wear head > >protection of some sort. > > Cycling is not a dangerous high speed sport, it is a means of > getting to the shops and so on. > So there is no need for jockeys and show jumpers to wear helmets then, because horses go at about the same speed as bikes! I understand that cyclists in cycle road races can get up to 60mph or more when going downhill. If you read TRL PPR446, you will find that even just falling sideways off your bike from a seated riding position can cause a skull fracture, with no need for any speed. This could happen after a glancing collision with a vehicle, or if you just lose balance for some reason. Helmet testing is done as a drop test, and your head can drop four times further before you might suffer an injury for the EN1078 standard. Derek C
From: Adrian on 8 Apr 2010 02:52
Derek C <del.copeland(a)tiscali.co.uk> gurgled happily, sounding much like they were saying: > So there is no need for jockeys and show jumpers to wear helmets then, > because horses go at about the same speed as bikes! I understand that > cyclists in cycle road races can get up to 60mph or more when going > downhill. > > If you read TRL PPR446, you will find that even just falling sideways > off your bike from a seated riding position can cause a skull fracture, > with no need for any speed. Cyclists head - around same distance from ground as pedestrian's head. Horse rider's head - around twice distance from ground as pedestrian's head. |