Alternative transcript:

health problems including: Heart disease. High levels of cholesterol. Narrowing of the blood vessels (reduced blood flow). Proteins Protein is needed in the body for the growth and repair of the body's tissues. Protein is found in meat, eggs, fish, nuts and cereal. Strength-based athletes need large amounts of protein to develop muscle tissue to increase their power. and mine. Vitamins and minerals are mostly found in fruit and vegetables. They are needed to maintain healthy bodily function. Some vitamins and minerals have specific uses. E.g. calcium is good for bone growth and development. Hydration Water makes up most of the human body (about 70%) and helps with chemical reactions in the body, such as lubrication (body processes running smoothly) and thermoregulation (maintaining body temperature). Therefore, it's vital that we stay hydrated. The factors affecting hydration are: Temperature Exercise Climate/environment The hotter we are, the more we will sweat and the more water we will lose. If we exercise, we are more likely to lose water (by sweating), which we will need to replace. Dehydration If we do not keep the water balance in our body, we can become dehydrated (lose too much water). Dehydration can lead to: Thickening of the blood (this means that water is lost from the blood, so the blood becomes thicker >> this reduces blood flow) Increased heart rate (thicker blood means the heart has to work harder and beat more to maintain the blood supply to the body >> this can cause an irregular heartbeat) Longer reaction time Fatigue Increased body temp