Why there is an increased pulse rate after exercise in order to break down lactic acid in our muscles?
342922
Muscles need oxygen to function, so the heart has to beat faster to keep on transferring blood (and its associated oxygen) to the muscles.  There's the whole lactic acid sidetrip, but that's the general concept, I think.  The acid is just a side effect from lack of oxygen.
659493
body needs more oxygen(in blood) to provide energy for the excercise, excitement etc.
17963
lactic acid doesn't have any relation to reproductive system.it accumulates in the body(in muscles)after long phisical exercising.i supose u could be paralised or at list poisoned after injection
480482
Has to do with oxygen demand.  During exercise your heart rate goes up because oxygen is being used much faster.  The faster pulse gets blood and oxygen to tissues faster.\n\nWhen you stop exercising, there is less demand for oxygen so the heart rate goes back down.  If it stayed high, it would cause high blood pressure and damage the vessels.
970619
This is not a matter of size or morphology, rather athletes have improved stroke volumes, and thus improved cardiac outputs compared to normal individuals.  This also means that they can sustain normal homoeostasis and metabolic activity during rest at lower heart rates than normal individuals.  Normal adults have resting heart rates over 70 beats/min, athletes normally below 70 and closer to 60 even.
677174
As we near this point, many hormones are released due to the excitement level and the fact we are usually subjecting ourselves to moderate aerobic exercise.  Adrenaline is one hormone released during the deed which makes our hearts beat faster. This all results in the need for more oxygen in the blood.  Our brain tells us to breath faster to compensate for all this.
358158
CARDIO SPORTS ARE SPORTS THAT BRING UP YOUR HEART RATE, AND INCREASE YOUR OXYGEN INTAKE GRADUALLY ON WHAT FITNESS PROFESSIONALS CALL A CURVE YOUR HEART RATE DECREASES GRADUALLY TOO. THIS GIVES YOUR HEART (a muscle) A GOOD WORK OUT AND STRENGTHENS IT. IT ALSO HELPS YOU BURN CALORIES BECAUSE IT GIVES YOUR METABOLISM A BOOST.\nSOME CARDIO SPORTS ARE RUNNING, AEROBICS,JAZZERCISE.
430076
b)less,because while you exercising your lungs needs more extra oxygen,makes your body need to breath more air
95500
During exercise, the quantity of blood pumped by the heart increases to match the increased skeletal muscle demand. Heart rate (HR) monitoring is a method commonly used to determine and assess exercise intensity levels. Exercise intensity is a key component of the training response. Therefore, it is important to understand the factors that can influence HR during exercise, so modifications can be made when establishing training heart rate (THR).
960201
As our bodies perform strenuous exercise, we begin to breathe faster as we attempt to shuttle more oxygen to our working muscles. The body prefers to generate most of its energy using aerobic methods, meaning with oxygen. Some circumstances, however, --such as evading the historical saber tooth tiger or lifting heavy weights--require energy production faster than our bodies can adequately deliver oxygen. In those cases, the working muscles generate energy anaerobically. This energy comes from glucose through a process called glycolysis, in which glucose is broken down or metabolized into a substance called pyruvate through a series of steps. When the body has plenty of oxygen, pyruvate is shuttled to an aerobic pathway to be further broken down for more energy. But when oxygen is limited, the body temporarily converts pyruvate into a substance called lactate, which allows glucose breakdown--and thus energy production--to continue. The working muscle cells can continue this type of anaerobic energy production at high rates for one to three minutes, during which time lactate can accumulate to high levels.\n\nA side effect of high lactate levels is an increase in the acidity of the muscle cells, along with disruptions of other metabolites. The same metabolic pathways that permit the breakdown of glucose to energy perform poorly in this acidic environment. On the surface, it seems counterproductive that a working muscle would produce something that would slow its capacity for more work. In reality, this is a natural defense mechanism for the body; it prevents permanent damage during extreme exertion by slowing the key systems needed to maintain muscle contraction. Once the body slows down, oxygen becomes available and lactate reverts back to pyruvate, allowing continued aerobic metabolism and energy for the body’s recovery from the strenuous event.\n\nContrary to popular opinion, lactate or, as it is often called, lactic acid buildup is not responsible for the muscle soreness felt in the days following strenuous exercise. Rather, the production of lactate and other metabolites during extreme exertion results in the burning sensation often felt in active muscles, though which exact metabolites are involved remains unclear. This often painful sensation also gets us to stop overworking the body, thus forcing a recovery period in which the body clears the lactate and other metabolites.\n\nResearchers who have examined lactate levels right after exercise found little correlation with the level of muscle soreness felt a few days later. This delayed-onset muscle soreness, or DOMS as it is called by exercise physiologists, is characterized by sometimes severe muscle tenderness as well as loss of strength and range of motion, usually reaching a peak 24 to 72 hours after the extreme exercise event.\n\nThough the precise cause of DOMS is still unknown, most research points to actual muscle cell damage and an elevated release of various metabolites into the tissue surrounding the muscle cells. These responses to extreme exercise result in an inflammatory-repair response, leading to swelling and soreness that peaks a day or two after the event and resolves a few days later, depending on the severity of the damage. In fact, the type of muscle contraction appears to be a key factor in the development of DOMS. When a muscle lengthens against a load--imagine your flexed arms attempting to catch a thousand pound weight--the muscle contraction is said to be eccentric. In other words, the muscle is actively contracting, attempting to shorten its length, but it is failing. These eccentric contractions have been shown to result in more muscle cell damage than is seen with typical concentric contractions, in which a muscle successfully shortens during contraction against a load. Thus, exercises that involve many eccentric contractions, such as downhill running, will result in the most severe DOMS, even without any noticeable burning sensations in the
380707
Simply, riding at a fairly constant rate causes the bodies' heart rate, oxygen intake and blood flow to increase, thereby improving your general (aerobic - with oxygen)cardiovascular fitness level. The leg muscles, primarily the quadriceps and calf muscles, also get a work out. Of course, the more resistance you place on the pedalling, the harder you work, and the effects on your body are greater. As you ride, your body also burns calories...the longer the ride, the more calories burned. This, of course, can be important in weight management. Hope this helps.
789940
There is a popular misconception that muscles are 'broken down' by the lactic acid that builds up during exercise, but this isn't quite true.  Lactate will indeed build up to high levels in the muscle, but not lactic acid.  The reason why acidosis may occur in muscles after strenuous exercise (leading to fatigue and then later soreness) is because of the protons that build up when ATP is hydrolysed.  This will cause some damage to the muscle fibrils (within the muscle cell), and when they recover they will be replaced with greater numbers.  Note, there is no increase in the amount of muscle cells, the muscle cells just get bigger.
254703
You are simply burning the lactic acid in your muscles.  You may be sore the next day, but that burning you are experiencing is harmless.
319336
Acid??? during intense use of muscles, oxygen becomes short in supply compared to demand. When that happens, the metabolism swithes to anerobic and the waste product is NOT \nCO2, but lactic acid. Lactic acid builds up within the muscles, and being a waste product, is a minor poison to the muscles. The muscles react by becoming sore. In anerboic metabolism, the energy conversion for carbs to energy is greatly reduced. Therefore, you will notice a tiring effect as you get farther into the excercising.
689323
When a person dies, a stiffening of the body occurs called rigor mortis.  \nThis is due to a build up of lactic acid in the body due to a lack of \nmetabolism and the muscles stiffen up.  You may have experieced a cramp or \n"Charlie horse" in a muscle after running or working out.  Lactic acid has \nbuilt up in your muscle and has caused a stiffening of the muscle.\n\nRigor mortis is temporary; eventually the muscles become flaccid again as \ndecomposition sets in.
763891
1.  C - Lactic Acid and ATP\n\n2.  B - Oxygen\n\n3.  Because when a human muscle needs energy, it uses stored energy (ATP) first. After that, there is an oxygen debt in the muscles so the muscles have to figure out a way to get energy without oxygen.  That would be lactic acid fermentation.  Lactic acid fermentation does produce energy for the muscle to use, but also produces a byproduct called lactic acid that causes the burning sensation we feel in our muscles.  After exercising, heavy breathing is required to "repay" the oxygen debt that the muscle has created.\n\n4.  The acidity of the salt prevents bacteria from breaking down the meat.\n\n5. The mitochodria provide the energy needed for the centrioles to pull the sister chromatids apart during mitosis and meiosis.  They are evenly spread after the seperation because both new cells would need the mitochodria for energy as well.
373078
If you are gasping for breath when you work out you are over doing it and you are not training correctly to the best of your ability you should be exercising at a rate that is comfortable and one that you feel you could hold a conversation whilst doing.  You need to be using the aerobic system this is where you use the oxygen you breathe in to transport oxygen around the body to the muscles being used the system that you are most probably using is the anaerobic system this is where the oxygen that you are taking in is only going to the organs so the muscles have to use reserves of the glucose that is stored in your liver this means your ability to burn fat is not as good and your muscles will get a build up of lactic acid which will make you sore If you feel "the burn" as they say then this is wrong. It is better to stay at a steady pace for longer that it is to increase too fast. Anyway the best technique to breathe is in through your nose and out through your mouth.