Responses to exercise Year 11 by Marcelle Clements

Cardiovascular system

cl12 — 2015-07-01 21:35:47 UTC

If we were to train for 6 months , we notice a decreased heart rate (your body is not needing to pump as much blood around to your body at rest because you are fitter) but an increase in stroke volume (the amount of blood pumped per heart beat) . The body will make more red blood cells so it can carry more oxygen around your body.

Muscular System

2015-07-01 21:38:55 UTC

If we were to train over six months, the muscles get bigger and stronger and more flexible because they fill with more blood. Ligaments and tendons become stronger which helps prevent injury. These connect joints and allow them to move, which also become more flexible with training. Muscles also contract with more force and a greater range of motion (i.e. more flexibility). With more training, muscles can store more energy.

Respiratory system

2015-07-01 21:40:03 UTC

When we exercise for 6 months a long term effect to our respiratory system is our diaphragm and muscles get bigger so therefore we can take in more oxygen and release more co2. This means that when we exercise it takes longer for our heart rate to increase. When we exercise it takes less time to recover after we finish exercising and our resting heart rate is lower. Also we can cope better with lactic acid and we have more alveoli in the lungs.

Energy systems.

cl12 — 2015-07-01 21:44:07 UTC

We can train our muscles to store more ATP (by doing exercises that last 0-30 sec - a 100m sprint) which means we can be more intense with our exercise for a longer duration of time before the anaerobic lactic acid system kicks in. By training our anaerobic lactic system (doing exercise that lasts from 10-30 secs e.g. 400m sprint), we can delay the onset of lactic acid building up in our muscles. By training our aerobic energy system (doing exercise for longer than 2mins non stop), we can make our body more efficient at supplying energy in the presence of oxygen. This means that we will be able to exercise at a moderate-low intensity for longer periods of time.