Bicycles Are Most Energy-Efficient Transport

The following is from Dr. Gabe Mirkin’s website, www.drmirkin.com.  It was forwarded to me by a friend and I couldn’t locate it online so am posting here to share the information.


Really enjoyed this somewhat quirky study of energy efficiency in transport and comparing human transport efficiency to a handful of animals.  Enjoy and ride on!

Dr. Gabe Mirkin’s Fitness and Health e-Zine
September 13, 2015
Bicycles Are Most Energy-Efficient

If you ride a bicycle, be proud. Humans riding on bicycles are more energy-efficient than any other animal and any other form of transportation. Vance Tucker of Duke University compared bicyclists to humans and animals running, birds flying and fish swimming, as well as to people in motor-powered cars, boats, trains and planes (J. Exp. Bio, 1973;68(9):689-709). The less energy per weight you use to travel over a distance, the more energy-efficient you are. Vance found that the most efficient creature without mechanical help is a condor. With mechanical help, the cyclist comes out on top. Here is a partial list, ranked from most to least energy-efficient:

human on a bicycle
condor
salmon
horse
human in a jet plane
human walking
human running
human in an automobile
cow
sheep
dog
hummingbird
rabbit
bee
mouse

Mice, bees and hummingbirds use the most energy per weight and therefore are very inefficient and tire the earliest. This concept explains why pre-historic human hunters could catch faster-running animals. The human would tire later, so it didn’t matter how fast the animal could run; if the human ran long enough he would eventually catch the exhausted animal.

A person on a bicycle is more energy-efficient than one using an automobile, motorcycle, train or plane, even though he is much slower. If you compare the amount of calories burned in bicycling to other forms of locomotion, you will find that 100 calories supplies an average cyclist for three miles, a walker for one mile and a car for only 280 feet. A walking human uses 0.75 calorie of energy per gram of body weight for each kilometer traveled, while a cyclist uses only a fifth as much, 0.15 calorie per gram per kilometer. The WorldWatch Institute reports that when you ride a bicycle you use only 35 calories per mile, while walking requires 100 calories per mile, buses and trains use about 900 calories per mile per person, and a car uses 1860 calories per mile (Ergonomics, 2008 Oct;51(10):1565-75).

Slow Riders Use Less Energy Than Fast Riders
Cycling is so energy-efficient that a good rider can go just about any distance. In 2014, Christopher Strasser won the Race Across America by cycling 3,098 miles in seven days, 15 hours and 56 minutes. He averaged 16.42 miles per hour. The record for a woman was set in 1995 at an average speed of 13.23 MPH. Interestingly, slow riders use less energy per mile than fast riders. During a one-hour ride, a person riding a touring bike for nine miles burns 135 calories with an average power of 50 watts. In an hour an experienced bicycle racer can go 30 miles but will burn 2150 calories and produce approximately 500 watts or 0.67 horsepower. You burn more calories per mile because the faster you ride, the greater the wind and air resistance. Resistance varies with the square of your speed. A recumbent bicycle is more energy-efficient because being lower to the ground reduces the size of the bike and body that is being blocked by wind and air resistance (Proc Biol Sci, 2001 Jul 7;268(1474):1351-60).

More Cars Than Bikes in North America
The world’s 6.1 billion people own 1.2 billion bicycles and only 600 million motorized passenger vehicles. That’s one bike per five people and one automobile per 10 people. However, the highly-developed countries are dominated by automobiles. The United States has:
* Twice as many automobiles as bicycles
* More than 90 percent of transportation trips done in automobiles
* Less than one percent of trips done by bike

Benefits of Riding a Bicycle
More people should ride bicycles because:
* Bicycles require the least energy to go places. Cars use 30 percent of world’s petroleum.
* Bicycles are far more energy efficient than running or walking.
* Bicycles produce less air pollution than motor-driven transportation.
* Bicycles are manufactured with far less material and labor than engine-driven forms of transportation.
* Bicycles help to prevent disease and prolong life by giving you the health benefits of exercise.

2015-07-07 13.15.25
Biking through the Wachau Valley along the Danube River in Austria – fantastic fun!

America’s Finest Bicycle Tour – October Debut for New Bike San Diego Event

Multi-day bicycle camping tour highlights natural beauty of San Diego

AmericasFinest_Logo-01
Thanks to A7D of North Park for design work!

Bike San Diego has had a busy year to date, adding many new events like the Beach Side Bike Ride from Old Town to La Jolla in July, the Bike Month Bash along El Cajon Boulevard in May, and the upcoming Bike to the Border ride from Barrio Logan to the Mexico border later this month on September 19.  In October another new event, the biggest for the organization to date, will debut. America’s Finest Bicycle Tour (AFBT), will showcase the natural beauty of San Diego and present an opportunity to connect with fellow participants.

AFBT is a three night bicycle tour of San Diego County with vehicle support for participants.  Vehicle support means that participants won’t have to lug their camping gear or clothes while they ride – their belongings will await them at each day’s destination.  Campsites are provided for each night, as is dinner and breakfast each day.  Food and beverages for the event feature San Diego establishments like Modern Times Beer, City Tacos, Golden Cost Mead, and other great local companies.

The three campsites are Sweetwater Summit, Dos Picos near Ramona, and Carlsbad State Beach – a variety of camping locations that give a broad view of the diversity of topography and climate present in San Diego.  Below is a map of the route, click through for a dynamic map you can manipulate for additional detail.

afbt map
2015 Inaugural AFBT Route

Cost for the event is $205 through September 26, increasing to $255 thereafter.  There is limited capacity for the event so interested parties are encouraged to register early to ensure a spot.  All proceeds benefit Bike San Diego, an organization working to “establish San Diego as a world-class bicycling city and create a more livable urban community by promoting everyday riding and advocating for bicycling infrastructure.”

For more details and to register see the official website – bikesandiegocounty.org.  For inquiries or questions please contact event organizer Tim Stempel at tim@bikesandbeers.org.

AmericasFinest_Poster

 

Airbnb Not Typically Allowed in Apartments

As the Airbnb debate continues in San Diego, I found it interesting to receive a warning letter from my previous apartment manager, Torrey Pines Property Management this week informing tenants that using sites like Airbnb is not allowed in the buildings they manage.  I contacted Torrey Pines and was informed that this is a proactive measure to avoid issues in future, not in response to issues that have occurred.  Good for them for taking a proactive, informative approach to the issue.

I wanted to share this since there are likely many San Diegans that would like to utilize sites like Airbnb to rent a spare room, or their apartment while they are out of town.  If you rent a property, or live in a building or community with an HOA it is important to check the terms or covenants, conditions, and restrictions before trying to host a guest on these platforms.  Note that this may also be the case even if you’re not receiving money by using a site like HomeExchange or Couchsurfing.

In addition to issues with your landlord, renting a room in your apartment or home is currently illegal in the City of San Diego and you may be liable for tens of thousands of dollars in fines as a woman in Burlingame has found out.  To date, this is the only penalty of this sort in San Diego but the Code Enforcement Division will be responding to complaints about this sort of use in the future and I assume pursuing violators with the same vigor as the Burlingame case.  Per conversations with Code Enforcement any enforcement will be complaint-driven – they won’t be using the publicly accessible information on sites like Airbnb and VRBO to identify potential violations.

If your lease doesn’t allow you to host on Airbnb but you think it would be beneficial try talking to your landlord.  Some landlords are willing to allow the use if you agree to take liability for any issues caused or may be willing to allow it for an increase in your rent payments.  I know a couple of people personally using this approach, and in San Francisco it worked out for a couple as well.

From SFGate:

Kelsey and Mike Sheofsky achieved that balance. The couple travel frequently for Shelter Co., their luxury-camping business. They had dabbled with the idea of listing their Mission District house on Airbnb. Then their landlord approached them.

“She said, ‘What do you think about Airbnb-ing your place when you’re gone?’ ” Kelsey Sheofsky said. “I thought, ‘Perfect, we’re ready to go.’ Now we do it, and we give her a 20 percent cut of any money we make after cleaning expenses. Some months we give her an extra 600 bucks.”

Your landlord may or may not be open to Airbnb – make sure you are informed and if you have a question make sure to ask.

2015-07-05 06.10.36
Our most recent Airbnb stay was in Budapest adjacent the Opera House.

Below is the letter from Torrey Pines in full.


Dear Resident(s):

The increasingly popular site airbnb.com where individuals can post short-term, vacation rentals is a growing concern for Landlords in San Diego due to the noise, strain on resources, and lack of regard for the property that comes from using any residence as a “Hotel” or “Bed and Breakfast”.

We would like to take this opportunity to remind our valued Residents that posting your apartment on this, or a similar site is considered a breach of contract and could result in legal action including eviction from the premises.

We take this matter very seriously and will be moving forward with legal action should your unit be located on a listing site for the purpose of subletting without our expressed written consent. Please contact your Property Manager if you have any questions or wish to report suspect or known violations.

Sincerely,

Torrey Pines Property Managment, Inc.
(858) 454-4200
www.torreypinespm.com