In my lesson last Thursday we learnt about long term affects and the structure of our bones.
Long term affects makes our muscles grow and makes our bones get stronger. This also increases our flexibility due to more synovial fluid and makes our tendons stronger aswell. We also manage to grow more cartalidge around the end of our bones and our lung capacity increases; our body also produces more red blood cells. This all happens because our body adapts to the way it is having to change. Over a long term, excercise makes the body much fitter so it needs to be able to keep up with itself.
Cardiovascular
Long term affects also make our heart get bigger and stronger when you excercise it. The stroke volume of the heart increases because it's much stronger than before.
Musculoskeletal
Our bone consists of three layers. Bone marrow, compact bone and cancellous (spongy) bone. The compact bone is the layer on the outside and the cancellous bone and bone marrow are on the inside. The more you excercise, the stronger your bones become, which makes them less likely to shatter if you ever have an accident.
Respiratory
The muscles between your ribs are called 'inter-costal' muscles and beneath your ribs you have a long muscle going horizontally called the 'diaphragm.' When you breath your inter-costal muscles and diaphragm expand. When you excercise they expand much more because your taking in bigger breaths.
When you excercise for a long period of time, say a few weeks or maybe a month or two, your body gets used to those daily excercises. For example, this could be what happens to a persons body after a few days of excercising:
Day 1-Go for a jog, last 10 minutes weak and out of breath
Day 2-5- Lasted 15 minutes, breathing more steady, not as tired and weak
Day 7-14-Same thing as before
Day 15-Lasted 30 minutes not tired, weak or out of breath
(During every jog from day 1-15 the muscles tear and repair getting slightly bigger and stronger. Due to muscles getting bigger, heart rate needs to increase so more o2 can be brought in to them. As your muscles get bigger, the bones need to be stronger to support them and more dense so they don't shatter.)
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