The muscular power (in Watts) of the man

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Grelinette
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Re: The power (watt) of the man




by Grelinette » 21/03/18, 19:30

Did67 wrote:PS: The easiest way is to give it a try on an exercise bike; any self-respecting model has a "wattmeter" ... You will quickly be fixed on the powers ...

It's a good idea, but where can I find a power meter to measure the power delivered on a standard exercise bike and an elliptical trainer?

The comparison would be interesting but I do not see how we can measure this power.
(if I can measure my power, I would have a T-shirt made: "Me, I make 300 Watts of power" : Cheesy: so well on I reach or exceed 300 watts : Cheesy: )
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Re: The power (watt) of the man




by Ahmed » 21/03/18, 19:33

Your slogan may be faint (sic!) For many!
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Re: The power (watt) of the man




by sen-no-sen » 21/03/18, 22:34

Grelinette wrote:
1 °) What do 300 human power watts mean? [/ B]
Is it theoretical power and maximum, knowing that depending on the mechanism that will recover (transform) this energy, for example a bike, we will exploit more or less these 300 watts? (which depend on the friction forces and the efficiency of the system, ...)


300 Watts is very, very optimistic!
The power of an average cyclist is about 100 watts *, effort that can be delivered for about 2 hours for a person with the correct physical condition.
And after 2 hours at this power, the rest is not stolen!
300 Watts corresponds to the effort of a top athlete, it is considered that beyond 400 Watts there is suspicion of doping over prolonged efforts ...

By using another mechanical system that makes better use of all muscular strengths, and not just calves and legs, will the energy delivered be higher than the 300 watts admitted?


No, because the energy will simply be better distributed among the different muscle groups, you will be able to glean some Watt at best
s with an optimization of your position.
In fact, the more you request muscular groups and the more the heart must provide a major effort to feed the last ones, the fact of making work more muscles will cause an increase in the heart rate until you reach your goal. maximum aerobic speed if you continue your effort to exhaustion.
Everything depends on your V02 max.

* That is 40 million cyclists to produce the power of an average nuclear power plant! Taking into account the load factor (fatigue, sleep meal, RTT, illness), it would be necessary to pedal the whole EU to replace four reactors! : Lol:
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Re: The power (watt) of the man




by Remundo » 21/03/18, 23:47

I believe that the best sprinters release around 800W, but there it only lasts a few tens of seconds, because they "burn" their muscles (lactic acid, cramp, loss of muscle efficiency)
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Re: The power (watt) of the man




by dirk pitt » 22/03/18, 10:16

Ahmed wrote:The slopes are probably more problematic, but the weight argument surprises me: vertically, the power is limited by the weight of the cyclist, since when the effort is greater than the latter, it is no longer useful for propulsion ... In the recumbent bike, the effort of the legs can be supported on the backrest.


I confirm: in recumbent bike, the power is not limited by weight while it is in conventional bike.
so for someone whose muscle power is less than their weight, the normal bike can develop a greater power.
BUT for someone whose leg power may be greater than his weight, the recumbent bike can develop more power.
small nuance: in classic bicycles dancer, one can go a little beyond the power due to the weight by effect of inertia of the body mass.
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Re: The power (watt) of the man




by Did67 » 22/03/18, 10:53

Grelinette wrote:
It's a good idea, but where can I find a power meter to measure the power delivered on a standard exercise bike and an elliptical trainer?



I can not affirm it formally, but I think that by delving into the "menus", all the exercise bikes which work with an electro-magnetic brake (not just the "roller which rubs while crushing the sausage") and who have a screen have that, for the simple reason that the power you develop is, except for friction, the power of the electric brake!

It is even the power by which you "program" your cycle of effort, with a gradual ascent, stages and a descent ...

You ask to do a free trial in a "torture device shed" and casually, you play with the powers. I don't know if at Décathlon or GoSport we can try ???
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Re: The power (watt) of the man




by Did67 » 22/03/18, 10:58

Ahmed wrote:The slopes are probably more problematic, but the weight argument surprises me: vertically, the power is limited by the weight of the cyclist, since when the effort is greater than the latter, it is no longer useful for propulsion ... In the recumbent bike, the effort of the legs can be supported on the backrest.


I expressed myself badly: to the power of the muscle, you added body weight. On a classic bike, a cyclist "pulls" on his arms, so the whole body forms a "muscle arc", roughly limited by the power of the thigh and calf muscles, which provide the bulk of the muscle. effort. As a dancer, you add the weight of your body. Of course, the muscles of the thighs develop a force much greater than the weight - but as said, the traction of the arms on the handlebars is added (in the big efforts - sprint, etc) ...

I think that anyway if the power was higher, it would be a long time that the tour de France would be recumbent! Or that we would have heard talk because it should have been forbidden! I can not imagine a sprint without a crash!
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Re: The power (watt) of the man




by dirk pitt » 22/03/18, 10:59

on a standard bike, there are pedals to measure the power but it's not given. several hundred euros.
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Re: The power (watt) of the man




by Ahmed » 22/03/18, 11:55

Did, you write:
I think that anyway if the power was higher, it would be a long time that the tour de France would be recumbent! Or that we would have heard about it because it should have been forbidden!

Indeed, the regulation of cycling races prohibits the recumbent bike.
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Re: The power (watt) of the man




by thibr » 22/03/18, 19:52

and even the lumbar support on the saddle of a normal bike
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