Bobby knows he will need a lot of energy in orderto compete and do his best in his cross country meet the next day.
Therefore he decides to have chicken Alfredofor dinner the night beforebecause Bobby knows that pasta is a complex carb which means it takelonger to break down and when it does break down it will have a lot of energy that can be used forlonger periods of time.Another reason why Bobbychooses to eat chicken Alfredo is because it has carbs, protein, and dairy.Allare essential for your body to perform. Once Bobby begins eating his dinner hisdigestive system is already at work.His teeth beginthe first functionby chewing the food. His salvia mixeswith his food and the enzymes, amalyse, which willbegin the chemical process. In this case the dairy from the Alfredo sauce, willbegin to be broken down by theacidic acid.
He food will then move down the esophagus and into his stomach,which is where most mechanical digestion occurs. Chemical digestion is carried out in the stomach by digestive juicesthat contain enzymesand hydrochloric acid. The protein from the chicken willbe digested by another liquid in the stomach called pepsin.
When the food has been digested into a liquid form, it moves into the next part of the digestivesystem.The small intestine is the part of the digestive system wheremost of the chemical digestion and absorbtion takes place. Enzymes help breakdown carbs from the pasta and proteins from the chicken.After chemicaldigestion takes place, the small nutrient molecules are ready to be absorbed bythe body by the villi lining the small intestine.This is where the dairy fromthe cheese will be finished being broken downand the amino acids. The blood carries the nutrients to all of the body’s cells.
That is very importantbecause these nutrientswill be crucial for tomorrow’s race.But we cant’t forgot allwhile Bobby is enjoying his meal his respiratory is hard at work.When Bobbybreathes, he inhales oxygen.
His lungs expand and his diaphragm tightens andmoves downward.The intercostal muscles between his ribs contract and helpexpand the lungs and chest cavity.The oxygen breathed travels down the trachea,into the lungs, and through the bronchi.After going through the bronchial tubesthe oxygen will enter the bronchioles and from there enter the alveoli. That iswhere cellular respiration takes place.Cellular respiration is when the alveoli make the gas exchange of oxygen snd carbon dioxide. When Bobbyexhales his diaphragm relaxes and pushesair out of himself, throughhis lungs and trachea and back out the nose and mouth.
The chest cavityand intercostal muscles relax and reduce the space in the chest cavity.The last part of preparation before the big meet is preparingthe heart. Leading up to the race Bobby has had runningpractice daily. He has been workinghard to keep is heart in shapeby training a little bit more each day. Hehas been very careful to stay in histargeted heart rate zone but also has been pushing himself. He has also beeneating healthy to avoid extra stresson his heart.
***The big day. *BANG*The horn has blown and Bobby is off. He is careful not to waste all of hisenergy at the start but is still able to get in the lead.This is where hisextra energy from the pasta kicks in. Because it is a complex carb it willprovide enough energy to finish his race.
Unlike simple carbs it will have a longer “life” and there will be nosudden loss of energy. Hisrespiratory system will be crucial during this race as well.As we all know without it, known of thiswould be possible. Because Bobby is exerting himself his body needs moreoxygen.Therefore his diaphragm is pushing upagainst his lungsmuch quicker than usual. That motion is pushing air out of you much more rapid than usual causing heavierbreathing.While that is taking place, Bobby’sheart is pumping blood around 150bmp. Since his heart is conditioned andprepared for this, it is able to manage the faster rate.
His blood is pumpingrapidly going from the right atrium, the right ventricle, through the pulmonary artery,picking up oxygenfrom the lungs,going back to the heartthrough the pulmonary veins, to the left atrium, theleft ventricle, to the aorta, the arteries, and distributing oxygen rich blood to Bobby’sbody.That process repeatsitself over and over duringthe race and will continuefor Bobby’s entirelife. Once the race finishes, Bobby eats a banana to supplement some of the nutrientslost during his race. His breathing will slow down, and his heart will continue to slow down but will never stop.
It will be importantto do a cool down walk for a beat to help his heart slow down safely.