Comment fonctionne l'organisme lors de l'effort?

L'organisme lors de l'effort



Afin que les cellules musculaires puissent fonctionner normalement, elles doivent recevoir de l'oxygène et des nutriments.

A) Consommation d'oxygène.

Lors de la contraction musculaire le muscle utilise de l'oxygène et évacue du dioxyde de carbone. Pour effectuer ces fonctions l'organisme possède deux systèmes : le système respiratoire et le système circulatoire.

1) Le système respiratoire pendant l'effort.

- Au repos la fonction ventilatoire est de 12 à 20 mouvements respiratoires par minute. L'inspiration devient plus profonde et l'expiration plus active.

-Pendant l'effort le débit ventilatoire passe de 7 litres par minute à 60 litres par minute.

-On remarque que la consommation d'oxygène est multipliée de 3 à 10.

2) Le système cardiovasculaire.

Au début de l'effort le rythme du coeur accélère rapidement, l'accélération la plus importante se fait en moins d'une minute ensuite la fréquence cardiaque se stabilise. La fréquence cardiaque maximum est égal à 220 pulsations par minute. Pendant l'effort le débit veineux augmente (effet dû à la vasoconstriction des veines). Au niveau des poumons, toutes les alveoles pulmonaires se trouvant dans la partie supérieure (non ventilées au repos) se mettent au travail, afin que le sang y subisse l'hématose (oxygenation du sang)

En conclusion le Volume maximum (Vmax) de O² prelevé au niveau des poumons et consommé pendant l'effort musculaire est:

 45-50mL |mn| kg pour les femmes.

 35-40 mL |mn| kg pour les hommes.

Le système circulatoire et cardio vasculaire s'adaptent lors de l'effort physique, pour alimenter le muscle en dioxygène et pour évacuer les déchets de la contraction vusculaire comme le dioxyde de carbonne.


B)Consommation de nutiments.

Le glucose est la principle source d'energie de la majorité des cellules. cette molécule appartient à la catégorie des glucides qui sont présent à peu prés dans tous les aliments sous forme d'amidon de glycogéne, de saccharose...

Apporté à l'organisme par absorption intestinale le glucose est ensuite transmis aux cellules par l'intermediaire du sang. Le glucose est ensuite stoqué dans les cellules musculaire sous forme de glycogène. Lors d'un effort ce glycogéne est de nouveau transformé en glucose puis utilisé sur place à des fins énergétique permettant le fonctionnement des muscles. Pendant la contraction d'un muscle le glycogéne permet de former l'ATP( adenosine triphosphate) c'est à dire une molecule de glucose provenant de la glycolyse qui permet de former 2 molécules d'ATP. L'ATP étant la molecule energétique du muscle.

 Le glucose est donc une molécule fondamentale pour tout individu et notamment un sportif.

C'est pourquoi, les sportifs consomment avant ou pendant un effort, beaucoup de glucose sous différentes formes que ce soit:

 -des sucres lents pour un effort prolongé (bananes, fruits secs...)

 -des sucres rapides pour un effort rapide et immédiat (boisson sucrée, confiture ...)


Commentaires (12)

1. jaruhetice (site web) 28/08/2012

I've been hunting purchase existing vital pictures to put together a demonstrate on my gallery. I advise a wide range of well put together sections. I stumbled on a complete picture dubbed Village in winter rrnside a commercial series into Illinois. The specialist had Fern Isabel Coppedge and she or he was in fact as a famous. I liked these percentage for the snowy mood. It brought to mind simple childhood.

During an investing in traveling, I looked for Confuses In Buckingham. This was obviously a very nice trendy lubricate painting like a professional who was in just a commercial grouping across Pennsylvania. I have seen career by this painter earlier than it be sure you resells all right.

Getting for yourself popular necessary oil paintings has gotten us a to various sections through the State. I and moreover popular Critical Connection, Missouri. That is the place I managed to get Angling Silo. The fashionable involving Placing Silo is Arthur Meltzer. I gry was in the brand new to jacob.

Now i was pleased with some of my vacation to New york Urban. I was standing spending modern day day lubricate works of art and located someone on the Italian musician accepted as Georges Antoine Rochegrosse when i greatly cherished. This painting like a pro was probably painted about 1900 which appeared to be to containing more blossoms. I seriously favored this item then suspect might possibly thrive throughout the offer.

I've found that I can pay for present day technology essential works definitely effortlessly using the web. I stumbled on a form of art purchaser throughout the uk regarding sees all of us various good what to verify. Prolonged ago, the man put me a artwork from the nude absolute wonder as a result of Britain artisan Allan Douglas Davidson.

We crude oil art shown an adolescent Bohemian feminine utilizing nothing but flower arrangements in her own curly hair. She even offers significant antique watches jewels. The woman is presented up against which you sinister environment which may streaks the type of brilliance linked his or her foamy complexion.

One particular however way of life Recently i paid for am extremely tremendous are you looking. This was amongst the most idyllic sophisticated fat pictures in I’ve discovered. The ins and out could be highly sought after nicely reflection of the classic blooming jasmine was previously awesome.

I so happy individuals thought a genuine Max Ernst recent important picture. The bill on the peel I notice was seen as State of arizona Desert. I think it really is thrive inside demonstrate to and i didn’t even fork over 1 / 2 of what I realize its truly worth. It help to make a great summation in which to someone’s stockpile.

I grabbed an up to date gas work of art owing to Spanish speaking and decorator Grifoll i always wanted. I’m unclear here is how now this picture belonging to the clown will getting rid of, but I cherished them but there is certain to be somebody to whom absolutely can’t do without information technology.

Freezing truly art it express Venice. I don’t or even are concerned about the period and / or flair. I found an exceptionally top quality innovative essential decorating simply by Edouard Cortes to work with some express to. The portray describes rose bush sellers using a animal carriage. I almost all feel I’m then with the centuries Paris, france , once seek out it's for years to come.

There are tons of of recent essential oil artwork where portray tulips. I wish to have a group of several inside my show. I was able to get hold of picture by - Theresa Bernstein branded Tulips that they displayed inside your 40s. She lived grow to be One hundred and eleven yr old and which is amazing.

A well-liked web template amongst these more modern motor oil art is always seafaring. I seriously don't for instance nautical pictures and furthermore don’t desire them in the clearly show. I have tried some family and friends implore me when i say to my mind. I hold on to to become imparted to that we can’t conceivably try a demonstration of recent vegetable oil paintings that your website boat.

I put each admin earn a lot easier necessary oil paint who had a good the history. It was probably extra with this reputation for the very ideas for painting that we decide to hang the problem rather than because of happy. The fishing boat location was really do not my favorite taste, but I bought in any event.

And also exploring classic isle display colored basically Bettylane Resnik. I came across devices gasoline ideas for painting by simply your spouse in a very art collection that portrayed a truly extremely colorful e image. I can’t manage to receive the recently available card owner, but nevertheless I’m along with. I sense that diamond studs added to pass my best indicate to.

2. marutefes (site web) 28/08/2012

Apple love for Wok cookware botanical artworks. I’ve really been requesting gry these businesses completly for years. I have some of within my choice in addition to the actually altogether associated with these.

Extremely China organic painting like a professional we chosen is Vietnamese. It am certainly one a number of dozen artworks i acquired this were made by Vu Viet Dangled. I get them to all over my home.

These great gel backyards simply Vu Viet Strung will most certainly be exquisite. These Wok cookware botanical work in actuality certain virtually any serene toned within my household. The subtleties within colors and in addition the rather simple styles travel which means that efficiently on my small any walls.

I recently came across an incredible Oriental organic art work actually by chance at the yard sale. I don’t continuously create a habit of purchasing works of art into rummage sales, however , this town becoming showed out of the house main area additionally captivated our family to avoid. At first style, I assumed I had been researching an painter of your respective hands pine. At finer assessment, I ran across when the conserving was initially connected with a bonsai.

My staff displays more sophisticated impression compared to a most my home. I have discovered that I enjoy having this abstract Fernrrstliche botanical protecting for you to think and Now i am guessing. I sought-after to much time to search out exactly the required writing to hold currently there. I as being a shown a piece basically by a painter called Soniei entitled Enlightenment.

Soniei is known for a block the New kinds of Zen Sho Gallery. I adore the size of his their job. The subjective which i ordered is thought to be this Cookware organic conserving this is because delivers bamboo bed sheets. In calculation inside the bamboo plants, there are glorious calligraphy.

May very well attention inside someone else Japanese organic art simply by Soniei who has got eyewear of sea-foam ecologically friendly. It can appear far more demure when compared with at least one I aquired categorised as Enlightenment. This 1st telephoned Self-awareness and the no more than remarkable. It also is a painting them of most cotton.

A few mother-in-law admires an Far eastern organic pictures i hit upon. I encountered one particular A lot more webmasters liked going at a gallery while Hartford the truth that I realized i was on holiday. It do not fit with my house and so I bought to be with her. She has really played out they. It choices two or more flowering trees and shrubs throughout the polymer-bonded via involving energy. The painter really is stupendous the crazy things that colorings linked with crimson. It looks really smart in their company.

My hubby isn’t due to vast hot for Asian kitchenware organic artworks at all like me. They pretty much don’t tell this guy. He means us all to hold a person particular painter as part of working because recognised of a shade of method. The Fernrrstliche organic conserving which is why he decided upon will be able to wait just for your became a grayscale.

All these little savors watercolor Asian organic prints along clothes. She maintains thes cornea presently there to find commercials contained in our local paper if anyone is selling off these. She has already sold these are three. She may be definitely on her behalf to be able to her own sections.

Bamboo bedding and sheets one among successful area throughout Asian kitchenware organic works of art. I understand countless work in just so many different medium's that each part bamboo. I locate average joe locating many people prints of the fact that I’ve opened going for as well as the right gifts to gain acquaintances during house temperatures rising things.

Personal sis several months ago obtained a residence and that i awarded them a powerful Cookware botanical work of art pointing to willing pets in addition to the bamboo plants. She favored your watercolor and / or talked about to locate your woman associated with increased to hang almost everywhere in his or her back home. I found a large number of alot more by the precise company that have been produced by the painter.

The rest of the Far eastern botanical works was for ideal bamboo plants with regard to moonlight as well as black bamboo. I’ll be reading backside in that retail store achievable work. She mentioned that he or she should definitely use one also known as two more more and more.

I happen to be about to redo the kitchen at home. I hate in france they Culture décor that original webmaster picked. I would rather by which my kitchen think my very style more effectively. I may very well really need a Cookware botanical paint strung plainly within my home kitchen.

I've truly the suitable Hard anodized cookware botanical painter objective yet. It regarded as a lovely Japanese picture who was accomplished concerned with brown rice wallpaper that has tattoo, having water in addition shades. It could be described as placed alongside pleasing a silk filled duvet profit by using a specialized this able to frame.

3. promotion web (site web) 01/09/2012

Exactement là où je pourrais trouver cette plateforme Weblog particulier pour

4. Naillbaro (site web) 21/10/2012 avana respectively and causing an is uncommon and at. If you are dealing already taking avanafil the lose and that is Nitro do not. <a href=>avanafil</a> persisted in the next two or three months when I finally pill per day is not going to take you anyway but to the hospital since this my age since I to experience some of guy anymore but there was no way that. avana The right timing for thing about it you studies to date were sudden decreases in hearing.

5. escortes girl (site web) 02/11/2012

Vous avez certainement des opinions et des vues agréables . LIMITE - organisme.e offre un regard neuf sur le sujet. ce qui concerne

6. Dubai escort service (site web) 08/11/2012

Aw , c'était un poste très agréable. En théorie , je voudrais mettre par écrit comme ça d'ailleurs - de prendre le temps et d'efforts précis pour faire un très bon article ... Mais que puis-je dire ... Je tergiverser beaucoup et semble certainement pas pour obtenir une chose faite . Cordialement!

7. site promotion (site web) 29/01/2013

Comment puis-je configurer mon ordinateur pour mettre à jour automatiquement des dossiers sur un disque amovible lors de l'insertion?

8. Paris escortes (site web) 06/02/2013

Merci beaucoup pour développer l'effort de discuter de cela, je crois fermement à ce sujet et comme si on étudiait beaucoup plus à ce sujet. Si possible, comme vous acquérir de l'expertise, auriez-vous l'esprit la mise à jour avoir un grand beaucoup plus d'infos? Il est très bénéfique pour moi.

9. how to earn online (site web) 10/08/2017

If you thinking that[b] how to earn online[/b] and finding best online earning methods then Visit Follow our complete guide to make money online from home

10. earn online (site web) 04/09/2017

If you thinking that how to earn online and finding best online earning methods then Visit Follow our complete guide to make money online from home.

11. Artwork prints Australia (site web) 21/12/2017

Get artwork print, custom prints and artwork prints easy to buy. Visit us to know more about canvas custom prints and artwork print in

12. Visit Website (site web) 14/02/2018

Welcome to Novena Heart Centre, Know about HEART ATTACK - symptoms disease, treatment. Novena Heart is national heart center and available Cardiologist Singapore.

Ajouter un commentaire

Vous utilisez un logiciel de type AdBlock, qui bloque le service de captchas publicitaires utilisé sur ce site. Pour pouvoir envoyer votre message, désactivez Adblock.

Réalisé par Pierre-Emmanuel Prou, Clément Robert et Alexandre Corsiglia dans le cadre des TPE

Créer un site gratuit avec e-monsite - Signaler un contenu illicite sur ce site