cycling
dr. dolittle | November 3, 2016Mitochondria produce more than just ATP
Anatomy of a mitochondrion from Wikimedia Commons
Pinchas Cohen from the University of California - Davis presented data showing that mitochondria produce more than just ATP. They also make several peptides that can each affect our physiology. Some help cells respond to insulin better, some help with weight, some regulate cell metabolism. What is even more impressive is that some of these peptides have been shown to slow down the development of atherosclerosis or Alzheimer's, and some even help prevent side effects from chemotherapy in animals. Maybe…
illconsidered | March 8, 2013Headline of the week from NPR. It is worth noting that even if the Republican representative has now apologized for his remarks and admitted they were stupid either because he realizes it or because he has to, he has not changed his position on a special tax on bicycles.
(h/t willard)
rallain | June 11, 2010Back to the discussion about hiding an electric motor in a pro racing cycle. Before, I looked at a video of Fabian Cancellara to see how his speed and acceleration compare to other bikers. The claim on the internet is that he pulls away so fast that he must have a motor hidden in his bike.
Just to be completely clear, I don't think he is cheating. Then why bother? If you ask that then this must be the first time you reading this blog. I welcome you. No, but really, this is what scientists do. How hard would it be to cheat?
From my analysis, it seems that a person could ride like he…
rallain | June 8, 2010Well, maybe that isn't the best title. You see, there is this video going around saying that it is possible that a professional bike racer was cheating by putting a hidden motor in his bike. I am not really going to talk about the cheating aspect (my gut feeling says that it would be too easy to catch, so he is not cheating).
Actually, there was an interesting analysis by Ron at CozyBeeHive. Quite a thorough job. He even used Tracker Video Analysis. However, he didn't use some of the nicer features of Tracker, so I figured I would do this analysis also. Plus, you know I love bikes.…
stoat | March 19, 2010
I'm wondering if this is fatal or not. Bike shops in Cambridge don't seem to do welding.
[Thanks to all who commented. The answer turns out to be the Genesis, £600, plus some mini-mudguards. To make things more exciting I'm buying it via the govt's bizarre buy-your-bike-from-work scheme, which (if it all works out) saves me 40% tax plus maybe some other bits. For those happy enough not to live here, there is some weird tax-dodge scheme encouraged by the gummint whereby the company buys the bike (in theory), or maybe some other leaseholding company, you rent it for a year whilst making…
tsaunders | March 12, 2010Photo by Kamshots.
Regular readers of Obesity Panacea will know that I am a huge fan of active transportation (e.g. walking or cycling to work, rather than commuting by vehicle). I just can't say enough good things about it. It often takes about the same amount of time as commuting by vehicle, plus it ensures that you're getting at least some physical activity on even the busiest days. Even just taking transit instead of driving yourself increases your chances of meeting the daily physical activity guidelines, since transit trips almost always involve some walking on either end of the…
rallain | February 28, 2010I ride my bike and mostly the wind makes me unhappy. On a very few days the wind is with me on the way to work and then changes so that it is with me again. But most days the wind is fairly constant. So, if the wind is constant then shouldn't everything even out? (Even Stephen).
Assumptions:
Let me start with the assumption that I (a mere mortal) can output at a constant power (but not 57,000 Watts like some people). I will also assume an air resistance force that is proportional to the square of the relative air speed. Here is a diagram.
A couple of quick things to point out. First,…