I exercise. I even bike sometimes. Mostly I walk everywhere. Walking is as good or better exercise than biking imo and I have the time to do it.
Good for you. But there you are...trying to 'one up what you do'. Why do you feel the need to say "What I do is better than what you do?". Because, hey I do aquafit* and that's definitely better than walking.
* No, I don't...but in the future I may.
It is not a one up, it is just math.
I should have qualified it because I'm comparing walking the same distance to biking the same distance. The amount of exercise I get per km walking vs. biking appears to be higher ie. it is easier and faster to bike than walk where I want to go (rec centre, grocery store, library).
In my case, the distance is fixed, and it works out to about 40 minutes of walking vs 12 minutes of cycling. Walking uses approx 334 kilojoules of energy for a 1.6km walk. Using a 1.6km distance, if you cycled at 20km/h at 70watts (arbitrary but vaguely-plausible numbers), you would be involve around 20 kilojoules being "sent to the pedals". If you are about 20% efficient, that would be 100 kilojoules burned.
If because you are biking you travel farther then the answer would shift at a certain point because you would actually be getting more exercise and burning more calories.
That said, ignoring the valid statistics and being all gung ho about biking no matter what and for everyone is not an approach that I would endorse as it smacks of black and white thinking. Particularly when someone else is walking instead of driving it seems pretty judgmental and ignorant to me.
Re-read GuitarStv's piece...
Perhaps you could focus your efforts on things that aren't splitting hairs like:
- OBESITY and the risk of diabetes, coronary heart disease and about 10 other associated risks.
- DRUG and ALCOHOL abuse and all their wonderful effects
- GUN and other violence
You'll find you may just get better bang for you buck mate.
Except the topic is bike safety. Are you saying that an alternate opinion is worthless in this case? Also, I'm a girl mate.
As far as helmets go, it seems country specific? In Canada helmets do not seem to reduce fatalities in any meaningful way:
http://www.vehicularcyclist.com/fatals.htmlCanada's government research report:
"It is apparent that mass helmet use is not contributing to the reduction in cyclist fatalities, at least not in any measurable way. The results suggest that traffic authorities should refocus to put their efforts into other proven measures. Programs aimed at motorist behaviour over the past 30 or so years have been effective in reducing fatalities among all road user groups, including pedestrians and cyclists."
The biggest factor in fatalities seems to be aggressive driving, then cyclist behaviour and then night reflective gear. Impairment is a factor: cyclist impairment was noted in 15.4% of fatalities in this study
http://bikecalgary.org/collision-statsAnyway, this is enough on the topic for me. It has been fully explored on the other thread.