Emma Whish Lab: Factors that affect heart rate! Introduction:! Heart rate is the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (BPML). The heart rate can vary according to the body’s physical needs, including the need to absorb oxygen and excrete carbon dioxide. Activities that can provoke change include physical exercise, sleep, anxiety, stress, illness, ingesting, and drugs.! Research Question: ! How does sit-up affects a person’s heart rate?! Hypothesis:!
If a person was compared his/her heart rate in without doing sit-ups and after doing setups, then the heart rate after doing sit-ups will be faster than the heart rate without doing sit-ups, because while doing sit-ups the person’s heart rate increases to support the need of oxygen of their muscle.! Independent Variable:! Heart rate (per minute)! Dependent Variable:! -Heart rate without doing sit-ups! -Heart rate after doing sit-ups! Controlled Variable(5):! Age of the participants (15-18)! Scale of timer (heart beat/ min)! Temperature during exercises (should stay constant)!
Body size of the participants (height and weight)! Gender of the participants (10 males and 10 females)! Materials:! – Recording utensil! – Stop watch! Procedure:! 1. Find 10 participants for both males and females.! 2. After ask them to put their middle and index finger on their neck (Side of the neck where the main vein is at).! Ask participants to count how many time the blood is pump on the vein (1 Min. ) Record beats after 1 minute of timing (Timing will be taken by stop watch).! Repeat step 2-4 twice (so total doing 3 times).! Ask participant to do 30 sit-ups.!
This supports the hypothesis of the experiment which is if a person was compared his/her heart rate in without doing sit-ups and after doing sit-ups, then the heart rate after doing sit-ups will be faster than the heart rate without doing sit-ups, because while doing sit-ups the person’s heart rate increases to support the need of oxygen of their muscle. ! The T-test result was there’s no significance, which means the result fits the stated hypothesis. Possible errors that could be made in the experiment or the important factor that might influenced the result may be amount of workout and gender wasn’t differentiated in the data collection.
This may be the mistake made during data election and thus affected the result since the range between heart rate before sit- ups and after wasn’t really obvious. This could be the weakness of the experiment, but since we are looking at the overall people’s heart rate before doing sit-ups and after sit-ups, this can also be the strength of the experiment.! To improve the experiment in the future, amount of workout and the potential physical ability should be part of the consideration during data collection, also any factor that can influence health like if the person has illness that could affect their heart rate.