Caffeine and Blood Pressure

722 Words3 Pages
Investigation to Determine the Effect of Caffeine on Blood Pressure Aim The Aim of this experiment was to determine the effect of caffeinated drinks of varying caffeine levels on the blood pressure of three different participants. Hypothesis It was thought that caffeine intake would have increased the blood pressure of each individual. It was thought that the heart rate of participant one would raise less than participant two and that participant three would have the highest difference. This was thought to be due to the average daily intake of caffeine that each participant determined from a pre-experimental questionnaire. Ti was also thought that the caffeine free Coca-Cola would show no change in blood pressure due to the Method Three adults of similar build and weight were chosen to participate in the investigation. Prior to the start of the investigation they were given a questionnaire to determine their average caffeine intake of each of them per week. The mg level of caffeine was calculated by using an equation for each drink and worked out for a volume of 250ml. The hot chocolate was measured by adding three heaped teaspoons of Cadbury’s hot chocolate powder mixed together with 250ml of boiling water. Material * Three participants of similar weight and build. * Automatic Blood Pressure Monitor * Medium Measuring cylinder * Notebook to record results * 4 different caffeinated drinks – Kick Energy Drink, Coca-Cola, Hot Chocolate and Caffeine Free Coca Cola. * Clock and Stopwatch | KICK | COCA COLA | HOT CHOC | CAFFEINE FREE COCA COLA | MG IN 250ml of drink | 80mg | 23mg | 8.4mg | 0mg | Worked over 4 separate days (Monday, Tuesday, Wednesday and Friday) – 250 millilitres of each drink was measured out using a measuring cylinder. Using the automatic blood pressure monitor, the blood pressure of each participant was

More about Caffeine and Blood Pressure

Open Document