The Musculoskeletal System

In our lesson we learned about what happens to our muscles and joints when we exercise. We also did a sit and reach test before and after activity to see what effect exercise would have on our muscles. When we are exercising our muscles are expanding and retracting, as we build up our muscles, our muscles will tear and grow and repair themselves to be stronger, which is why our muscles grow. The reason why our muscles hurt is because of lactic acid build up, This is why we have to stretch before we exercise, this releases as much lactic acid as possible which stops our muscles from hurting because it doesn't build up.Muscles also work in pairs to provide a balance, a sense of stability and movement in the areas in which they work. Also, because there is two sides of the body, the muscles in most cases, are opposite one another. Joints: Joints that are not directly joined, are lubricated by a solution called Synovial Fluid that is produced by the synovial membranes. This fluid lowers the friction between the articular surfaces and is kept within an articular capsule, binding the joint with its taut tissue. This synovial fluid in our joints acts as a shock absorber and reduces friction when we are exercising. My results before exercise on the sit and reach test was 31 and after exercise 36, this shows that as heat gets to your muscles and your muscles start to expand and retract intensely, your muscles become more flexible which helps you perform better during exercise.     

Links

There are links with everything that happens around the body. For example if your heart rate increases your breathing rate will have to increase as well. This happens because my arteries constrict and the blood pumps around my body quicker which is giving my muscles more oxygen. if you exercise for a long period of time your body will start to react faster which will improve how much you can exercise.  

Cardiovascular Results

We also calculated our Cardiovascular results. We ran round the pitch for 10 mins and recorded our heart rate Before,During and After. My result before was 96 BPM, During 108 And after 144. We did this by taking our heart rate for 10 secs and then X by 6.  The image below shows how blood pressure increases.

Blood Pressure

We tested our blood pressure today, we did this by using our teachers blood pressure monitor, the perfect value for our age group is 120/80 whereas mine was much higher at 142/76. My systolic was mild stage 1 whereas my diastolic was normal. if your blood pressure becomes to high or too low you can become dizzy,faint and nauseous. We then tested our blood pressure after 1 minute of exercise, my pressure was 160/83 which means my blood pressure is very high because it is in stage 2 of the high blood pressure chart.