When you exercise you use your muscles and your muscles contain Glycogen which could be considered your "energy source". during exercise your muscles use glycogen depleting your energy levels making you feel tired.
When you exercise, you need to move a lot, so you'll need more blood to carry oxygen and do gas exchange to transfer energy.
Mitochondria make the energy in your body. During exercise you need more energy so you need more energy "factories"
Your heart beats faster and you breathe more because your blood cells need more energy to give to your muscles
During exercise your muscles need more energy from respiration in order to contract. So your heart beats faster and the arteries supplying the muscles dilate (widen)
As you exercise, the muscles need more oxygen to work. The heart beats faster to get the oxygenated blood from the lungs to the muscles. The harder you exercise, the more oxygen the muscles need, the faster the heart beats.
Oxygen
Muscles are metabolically very active.So they need lot of energy.
Yes, your muscles need more blood pumping to them when they are getting
Because when you work your muscles they need more oxygen, and to get more oxygen you need to breathe more often.
muscles. The cells need to produce more energy
In order to operate our muscles, we need a substance called Adenosine Triphosphate (ATP). This provides the energy that our muscles need to contract and give us movement. In order to create ATP, our body needs a substantial amount of oxygen supplied via our blood to the cells. When we exercise, our muscles become overactive and require more and more ATP to function. As a result, our muscles need more oxygen, so we must breathe more (and usually faster) to supply them.
As we exercise, we use our muscles. Our muscles need oxygen to function. Therefore, the more we exercise, or the harder we exercise, the more oxygen we need. In order for our muscles to get that extra oxygen, we need to breathe more. The oxygen then enters our blood and our hearts beat stronger and faster in order for the oxygen to reach the muscles as quickly as possible, thus why our blood pressure increases.