This is an 8 weeks research proposal titled “Recovery heart rate between sprinters and long distance runners”. The main purpose of this research is to measure the recovery heart rate between a sprinter and long distance runner after a 5 minutes run in a treadmill. Heart rate recovery immediately after exercise is associated with a lower risk of cardiovascular disease and coronary heart disease (Morshedi-Meibodi, Larson, Levy, O’Donnell & Vasan, 2002). Sprinting is an athletic sport in the track category running over a very short distance in a limited time. It is very powerful and covers a distance of 400 meters or less (Platt, 2015) while long distance running also known as endurance running which is largely aerobic is a continuous running covering a distance of at least 3km and more (Jones, 2006). Long distance requires a lot of mental strength as well as stamina (Jones, 2006). Every muscle contains two types of fibers- fast and slow twitch. Fast twitch fibers fatigue quickly due to it producing fast contractions (Hoefs, 2015). So as a result long distance runners contain huge amount of slow twitch muscle fiber whereas a sprinter has fast twitch muscle fiber (Hoefs, 2015). There are a lot of physiological differences between those two different athletics event. For example the difference in the fiber types (as mentioned above), muscle size, architecture of leg muscles, cardiovascular capacity as well as metabolic pathways and heart rate. Further information on this will be provided in the discussion section about those differences. Researchers also reported that long distance runners have longer life span compared to sprinters or none athletes Question : Participants will be required to run in a treadmill for a period of 5 minutes at a certain speed and incline. Before further testing, resting heart rate of each athlete will be recorded and prior to the actual task those athletes have to make sure they warm up in order to prevent any injury. Warming up reduces the injury of tear or pulling of muscles or other injuries (Price, 2011). The major benefit is to loosen up and activate the muscles and allows you to do the exercise without any restriction (Price, 2011). All participants will be required to run on the same speed, treadmill fan off and make sure to set the incline on 0. This is to prevent any injury as it may lead to calf injury or Achilles tendon (Luff, 2017). This sequence does not need to be repeated again due to the amount of participants there are in order to get valid and reliable results.