Using muscles to power our lives is not a new idea. In fact, it's a really really old idea. But that doesn't mean it's not a good idea.

Especially since there's probably a million people trying to burn off calories on treadmills all over the world at this very moment. And all those calories they're burning are pretty much going to waste.

Well, almost all. There are actually a couple of gyms across the world that are converting those burned kilocalories into usable kilowatts. TreeHugger recently wrote about the "California Gym" in Hong Kong, which uses juice generated from people running on http://www.adime.es/generic-cialis-online treadmills to power the establishment's lights.

But can this really help? Is it worth attaching generators to millions of treadmills and pfizer cialis uk elliptical machines all over the world?

I think it may be time for some quick calculations.

50 watts per adult * 200 million adults in America * 1 hour of exercise per day * 1 billion watts per gigawatt * 365 days per year = 3650 gigawatt hours per year!

Solving the obesity epidemic and the energy crisis at the http://spionline.com.au/fda-approves-cialis same time. That's what I'm talkin' about!

The added cost to we use it discount generic levitra online the treadmills would likely be a lot less than putting solar panels all over the roof of wow)) levitra attorneys the gym and the power would be generated exactly when the establishment needs it. I can't imagine this wouldn't pay for itself relatively quickly.

See also:

-Turnstyle Power-

-Pedal Powered Laptop-

-When You Move...It's Electric-

Hits: 25342

Comments (15)

Re: Wierd Calculation

written by Mitch, June 27, 2007

written by Mitch, June 27, 2007

My mistake, it's 3,650,000 Watt*hours, not ten thousand, but that's still no where near 3650 GW*hrs.

Hrmmm

written by Hank, June 27, 2007

written by Hank, June 27, 2007

I'm pretty sure I'm right. You seem to be punching in 200 adults instead of 200,000,000 adults.

...

written by Michael Pereckas, June 27, 2007

written by Michael Pereckas, June 27, 2007

You divide rather than multiply by one billion to go from watt-hours to gigawatt-hours, which is what you evidently actually did. The number looks big until you see that US annual electricity generation is enter site levitra buylevitra onlin something like 4 million gigawatt-hours, more than a thousand times that amount. It still feels like the power ought to be useful, but a generator of non-negligible efficiency of such low power and running from such a low-speed input is apparently harder than it sounds. In my case, I use the power from pedaling to...propel the bicycle down the soft viagra road, toward my destination. Maybe a more practical idea.

humanpowergym.com

written by Gordon Foat, June 27, 2007

written by Gordon Foat, June 27, 2007

It's just a matter of time before we start selling our own energy to tramadol 10mb the GYM!

Keep eyes on humanpowergym.com

Keep eyes on humanpowergym.com

translation in Watts

written by Arnaud, June 27, 2007

written by Arnaud, June 27, 2007

The calculations are correct, but why the weird unit "gWh/year" ? Why not just use Watts instead?

3650 "gWh/year" = 0.4 GW

or 400 MW

which is less than one nuclear plant.

By the way, Giga is written "G", not "g".

"g" means gram.

3650 "gWh/year" = 0.4 GW

or 400 MW

which is less than one nuclear plant.

By the way, Giga is written "G", not "g".

"g" means gram.

Exercise bike analysis

written by Jason Olshefsky, June 29, 2007

written by Jason Olshefsky, June 29, 2007

I recently posted this to a mailing list I'm on when someone brought up the same idea:

Let's say you can get 60%

efficiency out of an exercise bike. For kicks, let's assume you've got

a steady stream of people who are out for a good hard workout, and

their average output is 200 watts; the average person can output about

120 watts (about 1/6 horsepower) for long periods of link for you generic levitra next day delivery time (more than an

hour or two) so 200 watts would be a hard ride -- compare the output to

the performance of a scooter with a 200-watt motor. Anyway, that gives

you 120 watts of electricity to work with.

So let's say your gym is open such that the bikes get continuous use

for about 40 hours a week -- 8 hours a day for 5 days. Each week you'd

be able to generate 40 hours * 120 watts = 4800 watt-hours of

electricity. If electricity costs about $0.15/kilowatt-hour (that is,

$0.15 per 1000 watt-hours) then you'd generate about $0.72 per week in

electricity for each bike. So if you wanted to break even in 5 years,

the retrofit on the exercise bike would need to be less than $0.72/week

* 52 weeks/year * 5 years = $187.20.

Thus, I guess it's a plausible model to only here mail order viagra work from.

Another way to look at the money side of things is to consider paying

people to pedal-for-power. In an 8-hour day producing 120

watts-per-hour (again, assuming you've got athletes biking), that's

about 1 kilowatt-hour per day. If you paid someone $6/hour, that would

mean the electricity would cost ( $6/hour * 8 hours/day ) / ( 1

kilowatt-hour/day ) = $48 per kilowatt-hour or about 320 times more

expensive than generated power today.

Let's say you can get 60%

efficiency out of an exercise bike. For kicks, let's assume you've got

a steady stream of people who are out for a good hard workout, and

their average output is 200 watts; the average person can output about

120 watts (about 1/6 horsepower) for long periods of link for you generic levitra next day delivery time (more than an

hour or two) so 200 watts would be a hard ride -- compare the output to

the performance of a scooter with a 200-watt motor. Anyway, that gives

you 120 watts of electricity to work with.

So let's say your gym is open such that the bikes get continuous use

for about 40 hours a week -- 8 hours a day for 5 days. Each week you'd

be able to generate 40 hours * 120 watts = 4800 watt-hours of

electricity. If electricity costs about $0.15/kilowatt-hour (that is,

$0.15 per 1000 watt-hours) then you'd generate about $0.72 per week in

electricity for each bike. So if you wanted to break even in 5 years,

the retrofit on the exercise bike would need to be less than $0.72/week

* 52 weeks/year * 5 years = $187.20.

Thus, I guess it's a plausible model to only here mail order viagra work from.

Another way to look at the money side of things is to consider paying

people to pedal-for-power. In an 8-hour day producing 120

watts-per-hour (again, assuming you've got athletes biking), that's

about 1 kilowatt-hour per day. If you paid someone $6/hour, that would

mean the electricity would cost ( $6/hour * 8 hours/day ) / ( 1

kilowatt-hour/day ) = $48 per kilowatt-hour or about 320 times more

expensive than generated power today.

Quit thinking dollars

written by Larry, August 22, 2007

written by Larry, August 22, 2007

The problem with everyone in the purchasing cialis in canada US is everything comes down to $'s. "Oh that's a great idea, but it would cost $X's" or "It will only save $X per year per person per blah blah blah". It's not about saving money, it's about consuming less electricity from dirty sources that are making us all sick, and killing the planet. If a good idea reduces our use of petroleum even a small amount, it's worth it- even if it does put us in the red.....

...

written by Randy Reed, September 22, 2007

written by Randy Reed, September 22, 2007

WHAT IS 2.500 GWh/year convert to MW WHAT IS THE

FORMULA

FORMULA

...

written by K, October 31, 2007

written by K, October 31, 2007

I think this makes sense (when I write ^ it means exponent)

50W x 1h = 50Wh

50Wh x 365 = 18250Wh

18250Wh x 200,000,000 = 3.65x10^12 Wh

3.65x10^12 Wh = 3650x10^9Wh

10^9Wh = 1,000,000,000Wh = 1 GWh

3650x10^9Wh = 3650GWh

50W x 1h = 50Wh

50Wh x 365 = 18250Wh

18250Wh x 200,000,000 = 3.65x10^12 Wh

3.65x10^12 Wh = 3650x10^9Wh

10^9Wh = 1,000,000,000Wh = 1 GWh

3650x10^9Wh = 3650GWh

Math aside

written by celia, November 23, 2007

written by celia, November 23, 2007

With all the people itching to work out and solar panels, I can totally see such gyms powering city blocks.

...

written by james, December 07, 2007

written by james, December 07, 2007

Dose anyone actual produce an exercise bike that kicks power out? I'm interested in buying one for my home! i think on a personal level the possible reduction in electricity bills minus the cost of a gym membership should pay of ordering viagra a bike withing a couple of years especially if you divide the whole lot by No. of family members!!

Residential use

written by Tom, December 19, 2007

written by Tom, December 19, 2007

Not sure if it would be worth it if the 50 watts per hour is accurate. I looked at my bill, and I average 11 KWH per day. So at that rate I would have to levitra no doctor kill myself to save a penny a day. Not to mention the dose viagra cost of the equipment.

...

written by jack downar, April 28, 2008

written by jack downar, April 28, 2008

I would also be interested in purchasing of such a machine (to power a TV...)

The concept is sale cialis brilliant (have thought about it may times in years...) the key beeing REVERESE A TREND (from consumption to micro-generation)

The concept is sale cialis brilliant (have thought about it may times in years...) the key beeing REVERESE A TREND (from consumption to micro-generation)

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This is wrong. Yes there are 1billion Watts in a GW, but you used it incorrectly in your conversion.

50 watts/adult * 200 million adults * 1 hour/day * 356 days/year = 10,000 Watt*hours, not 3650 GW*hrs

If you want to convert that into GW, then multiply by 1GW/1,000,000,000 W