Lastic Acid

Lactic acid is produced when glucose is broken down and oxidized. During intense exercise when oxygen levels are lower, more lactic acid is made, which produce hydrogen ions and a burning sensation in muscles while they’re active. However, on-going soreness in the days following an intense effort is not due to a build-up of lactic acid but tiny muscle tears and inflammations.

Energy systems

The stress on your muscles during exercise leads to tiny tears in your muscle fibres, these tears will cause swelling on your muscle tissues, this makes pressure on the nerve ending and pain. To repair these tears protein needs to be taken in food form, or protein shakes to build and repair these tears making them stronger.

Muscle fibre Micro Tears

Acute responses to the skeletal system are shown by the changes in the joints. In the joint synovial fluid is secreted, the synovial fluid helps to give a bigger range of movement during acute exercises. When the synovial fluid is secreted, it becomes less viscous causing it to be easier for a large range of movement to take place. ?Increased Range of Movement

Warming up before exercising is very important as it helps to stop injuries. This is done as we warm we are making heat, from our muscles contracting and creating friction. When doing exercise the muscle pliability is increased, meaning that your muscles are more flexible if they are pliable. As the muscles become pliable, this can also result in less injury

Increased Muscle Pliability

As the blood supply becomes higher, there is an increase in temperature and metabolic activity. As we start to exercise, our muscles work quickeer to produce energy at a quicker pace, to keep up with this movement and speed in the muscles. Oxygen in the red blood cells and other nutrients like minerals are imbedded in the muscles to give these muscles energy (glucose.) during exercise our muscles contract causing friction, producing heat.  70% of body heat is produced by energy production in muscle tissue.

Vasodilation of the capillaries on the skin, takes place to help control body temperature, allowing more blood to come to the skin therefore causing our bodies to sweat. If the temperature in our bodies is not kept cool and overheats, the enzymes in our bodies will begin to die. The greater the demand for oxygen is met by an increase in blood supply through capillary dilation.